Two children run and play in the grass.
Two children are falling asleep.
The children cannot be falling asleep while they run and play
exists e2 e1 x1 x2 x3.(n_grass(x3) & in(e2,x3) & Actor(e2,x2) & v_play(e2) & n_child(x2) & card_eq_2(x2) & Actor(e1,x1) & v_run(e1) & n_child(x1) & card_eq_2(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_asleep(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_fall(e1) & n_child(x1) & card_eq_2(x1))