One girl jumping over three others hanging on the side of a pool with ocean in background.
Everybody is sitting.
If one person is jumping  therefore everybody are not sitting.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8.(n_side(x5) & a_topic(x1) & over(e1,x3) & in(e2,x8) & n_background(x8) & with(e2,x7) & n_ocean(x7) & on(e2,x5) & of(x5,x6) & n_pool(x6) & Actor(e2,x4) & v_hang(e2) & (x3 = x4) & -(x3 = x1) & n_person(x1) & n_person(x3) & card_eq_3(x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_girl(x1) & card_eq_1(x1))
all x1.(n_person(x1) -> exists e1.(Actor(e1,x1) & v_sit(e1)))