People are photographing a building.
Some folks are taking pictures of a structure.
folks are   photographing
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_photograph(e1) & n_building(x2) & n_people(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & of(x2,x3) & n_structure(x3) & n_picture(x2) & n_folk(x1))