Some boys are in a front yard playing and one is trying to walk on his hands.
Brothers are playing in their yard after school.
Not all boys are brothers.
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 x1 x2 x3.(ne_org_brothers(x1) & after(e1,x2) & n_school(x2) & in(e1,x3) & n_yard(x3) & of(x3,x2) & n_thing(x2) & Actor(e1,x1) & v_play(e1))