A man is standing alone in a boat.
The man is standing on a marine vessel.
A man is standing in a marine vessel, which is also a boat.
exists e1 s1 x1 x2.(in(e1,x2) & n_boat(x2) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & on(e1,x2) & n_vessel(x2) & a_marine(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1))