Two girls in flip-flops walking.
Girls in flip-flops running.
If the girls are walking, they are not running.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_walking(x2) & a_flip-flops(s1) & Theme(s1,x2) & n_girl(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(ne_nam_girls(s1) & a_topic(s1) & in(s1,x1) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_flip-flop(x1))