A woman dancing at the club.
A man drinks vodka at a club.
There can be either a woman or a man at a club.
exists e1 x1 x2 x3.(n_club(x3) & a_topic(x1) & at(e1,x3) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_woman(x1))
exists x1 x2 x3 x4.(a_topic(x1) & at(x1,x4) & n_club(x4) & n_vodka(x1) & of(x1,x3) & n_drink(x3) & of(x1,x2) & n_man(x2))