A captain checks the life vests of his passengers.
A young man captain secures orange life vests on the passengers.
Not all captains are a young man.  Not all life vests are orange.
exists e1 x1 x2 x3 x4.(n_passenger(x4) & of(x4,x2) & n_male(x2) & n_vest(x2) & of(x2,x3) & n_life(x3) & Theme(e1,x2) & Actor(e1,x1) & v_check(e1) & of(x2,x4) & n_captain(x1))
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_passenger(x5) & Theme(e1,x3) & Actor(e1,x1) & v_secure(e1) & on(x3,x5) & n_vest(x3) & of(x3,x4) & n_life(x4) & a_orange(s2) & Theme(s2,x3) & n_captain(x1) & of(x1,x2) & n_man(x2) & a_young(s1) & Theme(s1,x1))