A man and two boys are bouncing on a trampoline.
the boy jumped alone on his pogo stick
Either there is a man and two boys or the boy was alone.
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 e1 s1 x1 x2 x3.(n_stick(x2) & of(x2,x3) & n_pogo(x3) & of(x2,x1) & n_male(x1) & n_boy(x1) & on(e1,x2) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_jump(e1))