A boy in red is jumping in a playground sandpit.
boy plays in sandpit
Jumping in a playground sandpit is something specific a boy who plays in a sandpit could do.
exists e1 x1 x2 x3 x4.(in(e1,x3) & n_sandpit(x3) & of(x3,x4) & n_playground(x4) & Actor(e1,x1) & v_jump(e1) & in(x1,x2) & n_red(x2) & n_boy(x1))
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_sandpit(x3) & n_play(x1) & of(x1,x2) & n_boy(x2))