I'm trying to analyze the sentence: "Plato was an influential Greek philosopher" to know the word class of each word. I entered this text into the Advanced Text Analyzer and i tried to check the sections: Summary, Words, Phrases, Topics and Text, and nothing regarding word classes came up, except for in Topics. Here, it states the following:

So apparently there are 3 Brown Corpus words, 2 Common Words, and so on. But when I want to see what those words are, nothing appears when I click each Group. How do I see what words they're referring to? Basically my end goal here is to know how many nouns are in my sentence. How do I use this text analyzer to achieve my goal?
Thanks