A group of people sift through shelves of books.
group of people rummaging through shelf of books
A group of people sift shelf of books
exists e1 x1 x2 x3 x4.(through(e1,x3) & of(x3,x4) & n_book(x4) & n_shelf(x3) & Actor(e1,x1) & v_sift(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & through(e1,x4) & of(x4,x5) & n_book(x5) & n_shelf(x4) & Actor(e1,x3) & v_rummage(e1) & (x2 = x3) & n_people(x2) & n_group(x1))