A group of people at a festival.
The group of people is at a library.
A library and a festival suggest different locations
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & at(x2,x3) & n_festival(x3) & n_people(x2) & n_group(x1))
exists p1 x1 x2.(n_group(x1) & exists x3.(at(x1,x3) & n_library(x3)) & of(x1,x2) & n_people(x2))