Two boys sit shirtless on a trampoline.
The trampoline is bouncy.
Just because two boys sit shirtless on a trampoline does not mean it is bouncy.
exists e1 s1 x1 x2.(on(e1,x2) & n_trampoline(x2) & a_shirtless(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & card_eq_2(x1))
exists p1 x1.(n_trampoline(x1) & exists x2.((x1 = x2) & n_bouncy(x2)))