photographers are taking pictures in a building.
The photographers are using a camera
taking pictures is done using a camera
exists e1 x1 x2 x3.(in(e1,x3) & n_building(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_photographer(x1))
exists e1 x1 x2.(n_photographer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_camera(x2))