Three young boys playing with the mud on a beach.
two boys make a sand castle
There are three boys, not two.
exists e1 s1 x1 x2 x3 x4.(n_mud(x3) & a_topic(x1) & with(e1,x3) & on(x3,x4) & n_beach(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3) & n_boy(x1) & card_eq_2(x1))