Q:

Can "among which" be used to introduce a verbless list of nouns?

I am having a disagreement about the validity of the following usage of "among which":

The movie won several awards, among which the best documentary and the
  best short film.

Is this sentence grammatical or must "among which" introduce a clause?

A:

The sentence would read better as "The movie won several awards, among them Best Documentary and Best Short Film."
As it is now, which would have to be followed by a verb (in this scenario, were), and the result is a comparatively awkward sentence: "The movie won several awards, among which were Best Documentary and Best Short Film."
I think the reason for this is that which is a relative pronoun used to introduce a relative clause. Clauses must have verbs, so in your original example the sentence feels unfinished: "among which the best documentary and best short film..." Were what? We need an action.
Them, on the other hand, is a simple pronoun, so it doesn't create a relative clause like which does. Therefore, we can end the sentence with the appositive phrase, "among them Best Documentary and Best Short Film."

