Some boys are in a front yard playing and one is trying to walk on his hands.
Kids are playing video games on the couch.
If kids are in the front yard playing, they cannot simultaneously be playing video games on the couch.
exists e1 p1 p2 x1 x2 x5.(Topic(e1,p2) & Actor(e1,x2) & v_try(e1) & exists e2.(on(e2,x5) & Actor(e2,x2) & v_walk(e2)) & n_hand(x5) & of(x5,x1) & n_male(x1) & n_thing(x2) & card_eq_1(x2) & exists s1 x3 x4.(in(x1,x3) & n_playing(x3) & of(x3,x4) & n_yard(x4) & a_front(s1) & Theme(s1,x3)) & n_boy(x1))
exists e1 s1 x1 x2 x3.(n_couch(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_game(x2) & a_video(s1) & Theme(s1,x2) & n_kid(x1))