Three young boys play outside.
Three boys are outside playing.
Three boys are playing outside.  Boys are young.
exists e1 s1 s2 x1.(a_outside(s2) & Manner(e1,s2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_playing(x2) & a_outside(s1) & Theme(s1,x2)) & n_boy(x1) & card_eq_3(x1))