A wet brown dog is playing with a white ball.
The dog is retrieving the ball so its master can throw it again.
Just because a dog plays with a ball does not mean that he is retrieving the ball.
exists e1 s1 s2 s3 x1 x2.(with(e1,x2) & n_ball(x2) & a_white(s3) & Theme(s3,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_brown(s2) & Theme(s2,x1) & a_wet(s1) & Theme(s1,x1))
exists e1 p1 x1 x2 x3.(n_thing(x2) & n_thing(x2) & n_master(x3) & of(x3,x2) & n_ball(x2) & n_dog(x1) & exists e2 p2.(exists e3 s1.(a_again(s1) & Manner(e3,s1) & Theme(e3,x2) & Actor(e3,x3) & v_throw(e3)) & Topic(e2,p2) & Actor(e2,x3) & v_can(e2)) & so(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_retrieve(e1))