Many businessmen and women at a social event.
It is a business conference.
Just because many businessmen and women are at a social event does not necessarily mean it is a business conference.
exists s1 s2 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & at(x2,x3) & n_event(x3) & a_social(s2) & Theme(s2,x3) & n_woman(x2) & subset_of(x1,s1) & n_businessman(x1) & n_quantity(x1))
exists p1 x1.(n_thing(x1) & exists x2 x3.((x1 = x2) & n_conference(x2) & of(x2,x3) & n_business(x3)))