A brown and white dog goes into water while looking back.
A dog is chasing a ball.
A dog can go to the water for anything and not necessarily for chasing a ball.
exists e1 e2 s1 s2 s3 x1 x2.(while(e1,e2) & a_back(s3) & Manner(e2,s3) & Actor(e2,x1) & v_look(e2) & into(e1,x2) & n_water(x2) & Actor(e1,x1) & v_go(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2) & n_dog(x1))