A man in a military uniform and life jacket captains a boat.
A Navy man captains a boat.
Other branches than the Navy can captain a boat as well.
exists e1 s1 x1 x2 x3 x4 x5 x6.(Theme(e1,x6) & Actor(e1,x1) & v_captain(e1) & n_boat(x6) & in(x1,x2) & n_jacket(x4) & of(x4,x5) & n_life(x5) & n_uniform(x3) & a_military(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_captain(e1) & n_boat(x3) & n_man(x1) & (x1 = x2) & ne_org_navy(x2))