a wet dog chasing a white ball
A dog is playing with a baseball.
You can not assume that the first sentence is talking about specifically a baseball.
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_ball(x3) & a_white(s2) & Theme(s2,x3) & (x1 = x2) & n_dog(x1) & a_wet(s1) & Theme(s1,x1))
exists e1 x1 x2.(with(e1,x2) & n_baseball(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))