bracketing constituents

[Unregistered]

In the sentence 'set in a beautiful 24 acre park framed by chestnut trees and lilac bushes, this lovingly restored 16th century chateau combines the character of yesteryear with the modern comforts of today'
Is it true to say 'this lovingly restored 16th century chateau' is the subject? can this be broken down/does it need to be broken down further into Od, Oi, Cs, Co or A? basically can a constituent consist of a phrase or does the analysis need to be deeper for bracketing the constituents? I hope this is making sense. THank you.

[Casiopea]

Is it true to say 'this lovingly restored 16th century chateau' is the subject?

Yes.

can this be broken down

Yes.

does it need to be broken down further

Yes.

into Od, Oi, Cs, Co or A?

Maybe A and others. Not the first four.

basically can a constituent consist of a phrase or does the analysis need to be deeper for bracketing the constituents?

The subject is an NP. That's phrase. It breaks down into its constituents,

demonstrative pronoun (this); modifies chateau
adverb (lovingly); modifies restored
adjective (restored); head of the AP
adjective phrase (lovingly restored); modifies 16th century chanteau
adjective (16th); modifies century
adjective (century); head of the AP
adjective phrase (16th century); modifies chateau
noun (chateau); head of the NP

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All the best.