A tan and white dog retrieving a ball on a gravel path.
A dog chases a cat.
A dog can not retrieve a ball and chase a cat simultaneously.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x4) & n_path(x4) & of(x4,x5) & n_gravel(x5) & Theme(e1,x3) & Actor(e1,x2) & v_retrieve(e1) & n_ball(x3) & (x1 = x2) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_tan(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_cat(x2) & n_dog(x1))