People at a photo shoot.
The people are models.
Just because they are at a photo shoot does it meant that they are models.
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_shoot(x2) & of(x2,x3) & n_photo(x3) & n_people(x1))
exists p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_model(x2)))