Two small dogs are chasing a ball.
There are some mammals and a ball.
dogs are mammals.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2) & n_dog(x1) & a_small(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1 x2 x3 x4.((x1 = x2) & subset_of(x4,x2) & n_ball(x4) & subset_of(x3,x2) & n_mammal(x3))