one black dog running with a ball and small tire in his mouth while another black dog follows.
Two dogs playing in a field, chasing after each other.
One dog being followed by another doesn't indicate chasing after each other.
exists e1 p1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(a_topic(x1) & exists e2 s4 x7.(Actor(e2,x7) & v_follow(e2) & n_dog(x7) & a_black(s4) & Theme(s4,x7) & -(x7 = x1)) & n_dog(x1) & n_dog(x1) & a_black(s3) & Theme(s3,x1) & while(e1,p1) & in(e1,x6) & n_mouth(x6) & of(x6,x4) & n_male(x4) & with(e1,x3) & subset_of(x5,x3) & n_tire(x5) & a_small(s2) & Theme(s2,x5) & subset_of(x4,x3) & n_ball(x4) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & a_black(s1) & Theme(s1,x1) & card_eq_1(x1))
exists e1 e2 x1 x2 x3.(all x4.(n_other(x4) -> after(e2,x4)) & Actor(e2,x3) & v_chase(e2) & n_dog(x3) & card_eq_2(x3) & in(e1,x2) & n_field(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))