A man and a woman sitting on a bench
A man and a woman eating a snack on a bench.
Not all people sitting on a bench are eating snack.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & on(e1,x4) & n_bench(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & Theme(e1,x4) & Actor(e1,x3) & v_eat(e1) & on(x4,x5) & n_bench(x5) & n_snack(x4) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))