Four boys playing soccer.
There are children playing soccer.
Boys are synonym of children.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_soccer(x3) & (x1 = x2) & n_boy(x1) & card_eq_4(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_soccer(x4) & (x2 = x3) & n_child(x2))