Four boys are playing at a wooden playground.
There are boys on the playground.
There are boys shows that it is four boys.
exists e1 s1 x1 x2.(at(e1,x2) & n_playground(x2) & a_wooden(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & card_eq_4(x1))
exists p1 x1 x3.(n_playground(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_boy(x2)))