A baseball pitcher prepares to throw.
A person is playing baseball
A baseball pitcher is likely playing baseball
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2.(Actor(e2,x1) & v_throw(e2)) & n_pitcher(x1) & of(x1,x2) & n_baseball(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_baseball(x2) & n_person(x1))