A ballerina poses outside.
A dancer is posing
The dancer is a ballerina, and she is posing outside.
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.(Actor(e1,x1) & v_pose(e1) & n_dancer(x1))