A child plays T-ball.
A girl is playing hopscotch.
A child can be a boy. A girl cannot be playing hopscotch and T-ball at same time.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_t-ball(x2) & n_child(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hopscotch(x2) & n_girl(x1))