Dog chases ball in water.
The dog is in pursuit of the ball
Chases is a paraphrase of is in pursuit of.
exists e1 x1 x2 x3.(ne_nam_dog(x1) & in(e1,x3) & n_water(x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2))
exists p1 x1 x3.(n_ball(x3) & n_dog(x1) & exists x2.(in(x1,x2) & of(x2,x3) & n_pursuit(x2)))