The dog tries to bite a big blue ball.
The dog has a ball.
The dog tries to bite a ball, so it must have a ball.
exists e1 p1 x1.(n_dog(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 s1 s2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_bite(e2) & n_ball(x2) & a_blue(s2) & Theme(s2,x2) & a_big(s1) & Theme(s1,x2)))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_ball(x2))