A group of men and women eating and drinking.
There are no women eating with the men.
There are either men and women eating and drinking or no women eating with the men.
exists x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & of(x1,x2) & n_drinking(x7) & n_eating(x6) & subset_of(x7,x4) & subset_of(x6,x4) & of(x4,x5) & n_woman(x5) & n_man(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_group(x1))
exists p1 x1 x4.(n_man(x4) & -exists e1 x2 x3.((x1 = x2) & with(e1,x4) & Actor(e1,x3) & v_eat(e1) & (x2 = x3) & n_woman(x2)))