A man sits on a boat in the sunset near a flag.
The man sits on a dock by his boat.
One cannot be both on a boat and on a dock simultaneously.
exists e1 x1 x2 x3 x4.(n_sunset(x3) & in(e1,x3) & near(x3,x4) & n_flag(x4) & on(e1,x2) & n_boat(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_boat(x3) & of(x3,x1) & n_male(x1) & n_man(x1) & on(e1,x2) & by(x2,x3) & n_dock(x2) & Actor(e1,x1) & v_sit(e1))