Two dogs chase a blue ball in a field.
Dogs are sleeping on a bench.
Dogs do not chase a ball and sleep at the same time.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & in(x2,x3) & n_field(x3) & n_ball(x2) & a_blue(s1) & Theme(s1,x2) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sleep(e1) & n_dog(x1))