Audience, who/which is

Hi,
this is a good one, lol. Do I use who or which with audience, in non-restrictive clauses?

But the audience, who/which is trying to follow the main story, is probably not paying much attention to characters like the janitor or the math teacher, so...

I know I have to use "who" for people, and "which" for objects... but I've never known what to use for groups of people or collective nouns (like "team", for example).

What should I do?
Thanks