There weren't any/some men.
any
There were some/any students in the classroom.
some
Who's this?
It's a child.
Who are they?
They're men.
Who's this?
It's a child.
Who are they?
They're children.
There were some/any children.
some
Who are they?
They're children.
Who's this?
It's a man.
There weren't any/some children.
any
There weren't any/some women.
any
Who are they?
They're women.
There were any/some teachers.
some
Who's this?
It's a woman.