A man is preparing to throw a bowling ball.
The man is a great bowler.
A man throw a bowling ball doesn't imply he is a great bowler
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_throw(e2) & n_ball(x2) & of(x2,x3) & n_bowling(x3)) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2.((x1 = x2) & n_bowler(x2) & a_great(s1) & Theme(s1,x2)))