A woman and a man are dancing in public
A couple is sitting down to eat
You can't be dancing and sitting.
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_public(x4) & Actor(e1,x1) & v_dance(e1) & subset_of(x3,x1) & n_man(x3) & subset_of(x2,x1) & n_woman(x2))
exists e1 p1 s1 x1.(a_down(s1) & Manner(e1,s1) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & exists e2.(Actor(e2,x1) & v_eat(e2)) & n_couple(x1))