A man and a woman walking in a field.
Two men playing in a field.
It is either two men or a man and a woman.
exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_field(x4) & n_walking(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_field(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))