A ballerina poses outside.
A dancer is posing for a photo
Just because she's posing, doesn't mean it's for a photo.
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_outside(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_pose(e1) & n_ballerina(x1))
exists e1 x1 x2.(for(e1,x2) & n_photo(x2) & Actor(e1,x1) & v_pose(e1) & n_dancer(x1))