A man in his boat on the lake
A man is outside.
In order to be in a boat on a lake, a man must be outside.
exists x1 x2 x3.(n_lake(x3) & a_topic(x1) & in(x1,x2) & on(x2,x3) & n_boat(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_man(x1))