A man, who has a nose ring, stares into the camera while brushing his teeth.
A man is looking at a camera.
It is more basic to state that a man is looking into a camera. Stating that he has a nose ring, stares into the camera while brushing his teeth is just more descriptive.
exists e1 e2 e3 x1 x2 x3 x4 x5 x6.(n_tooth(x6) & of(x6,x5) & n_male(x5) & n_camera(x5) & while(e2,e3) & Theme(e3,x6) & Actor(e3,x1) & v_brush(e3) & into(e2,x5) & Actor(e2,x1) & v_stare(e2) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_ring(x3) & of(x3,x4) & n_nose(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(at(e1,x2) & n_camera(x2) & Actor(e1,x1) & v_look(e1) & n_man(x1))