I would like to know if this sentence is grammatical, with its usage of the relative pronoun who.
(I) Our team is a happy bunch who works night and day.
I am getting two parses for this sentence:
(II) Our team is [a happy bunch who works night and day].
(III) Our team [is a happy bunch] who works night and day.
(for sentence (III), the relative clause who works night and day is modifying our team).
I am not sure if the usage of who is correct in either parse or the original sentence. For what it is worth, the sentence was written by a non-native speaker. Please advise.
Note this issue does not appear to be trivial. See this discussion as well: http://forum.wordreference.com/showthread.php?t=2935603.