How many mistakes can you find in this fragment?

[Icy Lake]

During the 1960’s, music unified a generation of English and French youth in protest against war, racial injustice, linguistic inequality and sexual discrimination. One of the most popular folk ballads of this time was a song written in the 1940’s by Woody Guthrie. The song “This Land is Your Land”, was a folk song of the people and for the people.In the 1960’s, singers like Bob Dylan, and the folk artist group, Peter, Paul and Mary, popularized the song for a new generation of North Americans. It was sung in schools. It was sung by hippies. It was sung by grandparents. It was sung across all cultural lines from India to Israel, Belgium to Sweden to Scotland. “This Land is Your Land” was written by Guthrie during the time of the Great Dustbowl era during The Great Depression. The Dustbowl was when several years of drought dried up western farmlands. Farmers in Canada and the United States lost their homes, their crops, their animals and their livelihoods. Fertile farm fields turned into sand and stayed like that for many years. It was also a time of economic depression.Guthrie travelled across the United States learning folk songs and playing music. He hopped a train and travelled with migrant workers who were heading out to California. Guthrie witnessed misery and suffering of the unemployed working class people. Later, Guthrie added more two politically critical verses attacking hunger and unemployment. “This Land is Your Land” was so popular that there are several international versions including a Canadian one sang by the group, The Travellers, in 1955. In the international versions, the geographical names are changed in the chorus.

[BobK]

Good question. (We don't do homework for you. Why don't you have a go? Then, people can comment on your efforts.)

b

[Icy Lake]

It is not my homework. This fragment was written by a native speaker who criticizes my English. I admit my own mistakes, but this person considers herself faultless.
I have discovered a few elementary errors in this fragmet and I would appreciate your comments.
Thank you.

[Icy Lake]

"fragment".

[Icy Lake]

1. Comma between subject and predicate? (The song “This Land is Your Land”, was)
2. Peter, Paul and Mary- the name of the group is lost among the commas.
3. It was sung across all cultural lines from India to Israel, from Belgium to Sweden and Scotland.
4. “This Land is Your Land” was written by Guthrie during the time of the Great Dustbowl era during The Great Depression. –maybe rephrase to avoid repeating “during”
5. Later, Guthrie added more two /wrong topic/politically critical verses attacking hunger and unemployment. “This Land is Your Land” was so popular that there are several international versions including a Canadian one sang by/a better order?/ the group, The Travellers, in 1955. In the international versions, the geographical names are changed in the chorus.

[Raymott]

1. Comma between subject and predicate? (The song, “This Land is Your Land”, was) [Should be two]
2. Peter, Paul and Mary- the name of the group is lost among the commas. [I could just make it out]
2b. No space between "people.In"
3. It was sung across all cultural lines from India to Israel, from Belgium to Sweden and Scotland. [A tad substandard]
4. “This Land is Your Land” was written by Guthrie during the time of the Great Dustbowl era during The Great Depression. –maybe rephrase to avoid repeating “during” [and should the Great Dustbowl be The Greatbowl...?]
5. Later, Guthrie added more two /wrong topic/politically critical verses attacking hunger and unemployment. “This Land is Your Land” was so popular that there are several international versions including a Canadian one sung by the group, The Travellers, in 1955. In the international versions, the geographical names are changed in the chorus.

Looks pretty standard for what we get here, though one would have to be at one's nastiest to attached much critical value to such trivial mistakes, and perhaps typos.

[BobK]

All those, and these two more:

What is a'folk artist group' Any one of them might have been called a folk artist, but the group was just a folk group.
And

Later, Guthrie added more two politically critical verses attacking hunger and unemployment.

'More two' If the existing verses had been politically critical, he could have written two more [sic] As they weren't, 'Guthrie added two further politically critical verses' would be preferable. (This criticism is a bit nit-picking, but the use of "further" would have the added benefit of avoiding the ambiguity of 'added two more politically critical verses' ('two more' or 'more critical'?)

b

[Icy Lake]

Thank you all. The problem is that this fragment is part of a manuscript.
This person wouldn't accept any comments beyond a missing comma. She keeps saying " In English, this is how we say; this is proper English " etc.
All your comments are highly appreciated.

[Soup]

What about?

During the 1960’s, music unified a generation in protest against war, racial injustice, linguistic inequality, and sexual discrimination. One of the most popular folk ballads of the time "This Land is Your Land" was a song that had been written in the 1940’s by Woody Guthrie. It was a folk song for the people, of the people, and by the people.

In the 1960’s, many singers including Bob Dylan and the folk artist group Peter, Paul and Mary popularized the song for a new generation of North Americans. It was sung in schools. It was sung by hippies. It was sung by grandparents. It was sung across all cultural lines from India to Israel, Belgium to Sweden to Scotland. The song has several international versions, the geographical names of which change, including a Canadian version sung by The Travellers in 1955.

“This Land is Your Land” was written during the Great Depression, the time of the Great Dustbowl era, when several years of drought had dried up western farmlands. Farmers in Canada and the United States lost their homes, their crops, their livestock and their livelihoods. Fertile fields turned into dust and stayed like that for many years.

It was a time of economic woe, of misery and suffering for the unemployed working classes. Guthrie hopped a train and travelled across the United States with migrant workers heading out to California. He learned folk songs, played music, and later added two politically critical verses attacking hunger and unemployment.

[Icy Lake]

Thank you, Soup.
I am also asking myself if Dustbowl is written as one word or two (as I found in some sources).