A man sits and poses for the camera.
The man is smiling for the camera.
Not all person that poses for camera should be smiling.
exists e1 e2 x1 x2 x3.(n_camera(x3) & for(e2,x3) & Actor(e2,x2) & v_pose(e2) & n_man(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2.(n_camera(x2) & n_man(x1) & for(e1,x2) & Actor(e1,x1) & v_smile(e1))