A girl is jumping on a trampoline with her arms in the air, while a boy in a blue shirt is bouncing on his stomach.
A girl bounces on a trampoline with her brother.
A girl and a boy bouncing on a trampoline does not imply the girl is with her brother.
exists e1 p1 x1 x2 x3 x4 x7.(n_air(x4) & exists e2 s1 x5 x6.(on(e2,x7) & Actor(e2,x5) & v_bounce(e2) & in(x5,x6) & n_shirt(x6) & a_blue(s1) & Theme(s1,x6) & n_boy(x5)) & n_stomach(x7) & of(x7,x2) & n_male(x2) & while(e1,p1) & with(e1,x3) & in(x3,x4) & n_arm(x3) & of(x3,x1) & n_female(x1) & on(e1,x2) & n_trampoline(x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))
exists e1 x1 x2 x3.(on(e1,x2) & with(x2,x3) & n_brother(x3) & of(x3,x1) & n_female(x1) & n_trampoline(x2) & Actor(e1,x1) & v_bounce(e1) & n_girl(x1))