The answer is that concession is a noun
Textual evidence and quotes from text
"the harsh restrictions provoked anger and outrage in the public," is an independent clause. An independent clause is a clause that can stand alone as a sentence and does not need any other parts.
"During the long winter" is an adverbial clause, which means it is describing how something is before the sentence. It could be more closely compared to a dependent clause because it cannot act alone in a sentence.
Although it was my first day in 8th grade, Mom and Dad decided it was more important to take my brother infantile Irving to school before I complain they chastised me for getting upset.
