People examine books in a library.
People are buying books at the bookstore.
People are either examining or buying books. They are either at a library or a bookstore.
exists e1 x1 x2 x3.(in(e1,x3) & n_library(x3) & Theme(e1,x2) & Actor(e1,x1) & v_examine(e1) & n_book(x2) & n_people(x1))
exists e1 x1 x2 x3.(n_bookstore(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_buy(e1) & n_book(x2) & n_people(x1))