Two children are laughing in the grass.
the children sleep in the living room
If they are sleeping they cannot be laughing. Grass implies outdoors, whereas living room implies indoors.
exists e1 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_laugh(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_room(x2) & of(x2,x3) & n_living(x3) & n_child(x1) & in(e1,x2) & Actor(e1,x1) & v_sleep(e1))