A boat is illuminated at night.
A boat is using the lights to see at night.
Just because the boat is illuminated does not mean the boat uses the lights to see.
exists e1 x1 x2.(at(e1,x2) & n_night(x2) & Theme(e1,x1) & v_illuminate(e1) & n_boat(x1))
exists e1 p1 x1 x2.(n_light(x2) & Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2 x3.(at(e2,x3) & n_night(x3) & Actor(e2,x1) & v_see(e2)) & n_boat(x1))