"Years of bitter dispute about whether to progress with the eradication led to a poll..."
I'm not sure whether "years" or "dispute" should be subject.
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Sign up to join this community"Years of bitter dispute about whether to progress with the eradication led to a poll..."
I'm not sure whether "years" or "dispute" should be subject.
Years of bitter dispute about [whether to progress with the eradication] led to a poll.
Here's a simplified tree diagram of the sentence. The head of the subject NP is "years", and the bracketed whether element above is a subordinate interrogative infinitival clause (embedded question) functioning as complement of "about".
Note that the phrase-level constituents are complements, not modifiers
It looks like you're asking about the simple subject, the keyword of the phrase that is the complete subject.
It's "years". Those years led to a poll.
In contrast, "dispute" is the simple object of the preposition "of".
Questions like this one are often related to subject/verb agreement. In the example sentence, this hardly matters. Both "years led" and "dispute led" agree. However, "years do lead" and "dispute does lead" show a difference in agreement, which is reflected in "years of dispute do lead".
As a rule of thumb, you should be able to remove all the modifiers in a subject without removing this keyword:
Years
[ of bitter dispute [ about whether to progress [ with the eradication ] ] ]led to a poll
We ignore "with the eradication" because it modifies "to progress". We ignore "about whether to progress . . ." because it modifies "dispute". We ignore "of bitter dispute . . ." because it modifies "years".
'Years led to a poll' is the grammatically correct sentence although it doesn't make much sense. Sometimes being grammatically correct just doesn't mean anything, does it!