is the question word -who- always singular?

[nyota]

Hello, 5jj.

I am a bit confused here.

Isn't who the grammatical subject of the verb be in the following sentence?

Who are those people over there?

Many thanks

Richard

*** I'm not a teacher***


1)
Who are those people over there? The answer is:
They (those people) are dancers.


2)
Who dances over there? The answer (a bit awkward but just to make a point):
Those people you saw earlier (dance there).

In (1) 'who' asks about the object, in (2) 'who' asks about the subject.