A man in an airport waves at the camera.
The man is at the airport.
A man waves at the camera.
exists x1 x2 x3 x4.(n_camera(x4) & a_topic(x1) & in(x1,x2) & at(x2,x4) & n_wave(x2) & of(x2,x3) & n_airport(x3) & n_man(x1))
exists p1 x1 x2.(n_airport(x2) & n_man(x1) & at(x1,x2))