A dancer poses in an empty room.
The dance is in dance class.
empty room is contradictory to dance class.
exists e1 s1 x1 x2.(in(e1,x2) & n_room(x2) & a_empty(s1) & Theme(s1,x2) & Actor(e1,x1) & v_pose(e1) & n_dancer(x1))
exists p1 x1.(n_dance(x1) & exists x2 x3.(in(x1,x2) & n_class(x2) & of(x2,x3) & n_dance(x3)))