Two boys jumping on a trampoline.
There are two males.
If there are two boys, there are two males.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_trampoline(x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_boy(x1) & card_eq_2(x1))
exists p1 x1 x2.((x1 = x2) & n_male(x2) & card_eq_2(x2))