A man facing the camera and smiling while behind the wheel of a car.
While driving a car a man is facing the camera and smiling with his friends
A man facing the camera and smiling while behind the wheel of a car doesn't mean that he is smiling with his friends.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_wheel(x5) & n_camera(x3) & a_topic(x1) & behind(e2,x5) & of(x5,x6) & n_car(x6) & r_while(e2) & Actor(e2,x4) & v_smile(e2) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_face(e1) & (x1 = x2) & n_man(x1))
exists e2 e3 e1 x1 x2 x3 x4 x5 x6.(n_friend(x6) & of(x6,x4) & n_male(x4) & n_camera(x4) & while(e3,e1) & with(e3,x6) & Actor(e3,x5) & v_smile(e3) & n_man(x5) & while(e2,e1) & Theme(e2,x4) & Actor(e2,x3) & v_face(e2) & n_man(x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_car(x2) & n_thing(x1))