A man sits and poses for the camera.
The man is standing up for the camera.
If someone is standing up they cannot be sitting and posing at the same time.
exists e2 e1 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 s1 x1 x2.(n_camera(x2) & n_man(x1) & for(e1,x2) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1))