Two infants are at play in the yard.
The children sit in the grass.
Play in the yard doesn't imply sit in the grass.
exists p1 x1 x3.(n_yard(x3) & exists x2.(at(x1,x2) & in(x2,x3) & n_play(x2)) & n_infant(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_grass(x2) & n_child(x1) & in(e1,x2) & Actor(e1,x1) & v_sit(e1))