A boy is playing in a room full of balls.
A boy is playing with a bike.
A bike is not a room full of balls
exists e1 s1 x1 x2 x3 x4.(in(e1,x2) & of(s1,x4) & n_ball(x4) & Theme(s1,x3) & a_full(s1) & (x2 = x3) & n_room(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
exists e1 x1 x2.(with(e1,x2) & n_bike(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))