A boy chasing a baseball.
The boy is wearing a baseball cap.
You can not infer he has a cap.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_baseball(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_cap(x2) & of(x2,x3) & n_baseball(x3))