photographers are taking pictures in a building.
The photographers are taking pictures of people in the building
It cannot be inferred that the pictures are of people.
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 x3 x4.(n_building(x4) & n_photographer(x1) & of(e1,x3) & in(x3,x4) & n_people(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2))