People are lined up wearing life jackets.
There are people in a boat.
Not all people are in a boat.
exists e2 e1 s1 x1 x2 x3.(for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_wear(e2) & n_jacket(x2) & of(x2,x3) & n_life(x3) & a_up(s1) & Manner(e1,s1) & Theme(e1,x1) & v_line(e1) & n_people(x1))
exists p1 x1 x2.(in(p1,x2) & n_boat(x2) & exists x3.((x1 = x3) & n_people(x3)))