Three children are playing in sand near to the beach.
Three children together on a school trip to the beach.
Just because children play in sand does not mean they are on a school trip.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & in(e1,x2) & to(s1,x4) & Theme(s1,x3) & a_near(s1) & (x2 = x3) & n_sand(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_3(x1))
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & on(x1,x2) & to(x2,x4) & n_trip(x2) & of(x2,x3) & n_school(x3) & r_together(x1) & n_child(x1) & card_eq_3(x1))