A baseball pitcher prepares to throw.
The baseball pitcher is shooting a basketball.
A baseball pitcher can't be preparing to throw and shooting a basketball.
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 x3.(n_pitcher(x1) & of(x1,x2) & n_baseball(x2) & Theme(e1,x3) & Actor(e1,x1) & v_shoot(e1) & n_basketball(x3))