Four people in life jackets float on a raft.
Some people are standing in a bullring.
Floating on  a raft is not possible in a bull ring.
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_raft(x4) & Actor(e1,x1) & v_float(e1) & in(x1,x2) & n_jacket(x2) & of(x2,x3) & n_life(x3) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2.(in(e1,x2) & n_bullring(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))