Three people are posing for a camera.
Three people don't know their photo is being taken
people who don't know their photo is being taken will not be posing for a camera.
exists e1 x1 x2.(for(e1,x2) & n_camera(x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & card_eq_3(x1))
exists x1 x2.(-exists e2 e1 x3.(Theme(e2,x2) & Actor(e2,x1) & v_know(e2) & Theme(e1,x3) & v_take(e1) & (x2 = x3)) & n_photo(x2) & of(x2,x1) & n_thing(x1) & n_people(x1) & card_eq_3(x1))