The lights were used for a safe landing, so where were they installed?\nOptions:\n- building\n- turned at night\n- road\n- carnival\n- plane Hmmm, let me think.
User
Plane is an aeroplane or is a powered flying vehicle with fixed wings and a weight greater than that of the air it displaces. The lights were used for a safe landing, so they were installed in plane.
So, the answer is plane.
Assistant