If you make '1987' the subject of your sentence it would be a noun.
Noun
adverb
what part of speech is work
i want to know what part of speech is camping
what part of speech is beneath
what part of speech is eleven
Year is a noun.
in the year 1987
What part of speech is this
It is a compound noun or noun phrase.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
Mr- President - 1987 Freedom of Speech 1-4 was released on: USA: 31 May 1987
Sashay is a verb. It means to walk in an exaggerated, showy manner, often with hip swaying.
The word "month" is a noun in the sentence. It is used to identify and refer to a particular unit of time.