Two dachshunds, one black the other brown, run on grass.
The dogs are chasing after a boy.
Dogs can run without chasing.
exists e1 s1 x1 x2 x3 x4.(n_brown(x3) & on(e1,x4) & n_grass(x4) & Actor(e1,x1) & v_run(e1) & rel(x1,x2) & -(x2 = x3) & n_brown(x2) & a_black(s1) & Theme(s1,x2) & card_eq_1(x2) & n_dachshund(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_dog(x1) & after(e1,x2) & n_boy(x2) & Actor(e1,x1) & v_chase(e1))