A man and two boys are bouncing on a trampoline.
the kids are friends
The two boys don't have to be friends just because they are playing together.
exists e1 x1 x2 x3.(on(e1,x3) & n_trampoline(x3) & Actor(e1,x1) & v_bounce(e1) & n_boy(x1) & card_eq_2(x1) & of(x1,x2) & n_man(x2))
exists p1 x1.(n_kid(x1) & exists x2.((x1 = x2) & n_friend(x2)))