Two boys are holding up their dirty hands while standing on the beach.
two boys doing homework
If the boys are holding up their dirty hands, then they are not doing homework.
exists e2 e1 s1 x1 x2 x3 x4.(n_beach(x4) & while(e1,e2) & on(e2,x4) & Actor(e2,x1) & v_stand(e2) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_hand(x2) & of(x2,x3) & n_dirty(x3) & of(x2,x1) & n_thing(x1) & n_boy(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_homework(x3) & (x1 = x2) & n_boy(x1) & card_eq_2(x1))