The man and woman are sitting by the boats.
The man is near a boat.
A man could be sitting by the boats with a woman.
exists e1 x1 x2 x3 x4.(n_boat(x4) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & by(e1,x4) & Actor(e1,x1) & v_sit(e1))
exists p1 x1.(n_man(x1) & exists x2.(near(x1,x2) & n_boat(x2)))