A man sits in a boat on a lake.
a man is outside
sits in a boat on a lake doesn't imply that he is outside.
exists e1 x1 x2 x3.(on(e1,x3) & n_lake(x3) & in(e1,x2) & n_boat(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_man(x1))