Two people signing books.
Two people are standing in line waiting to have their books autographed.
The people must be either signing books for standing.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_sign(e1) & n_book(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 e2 p1 x1 x2 x3.(for(e1,e2) & Topic(e2,p1) & Actor(e2,x1) & v_wait(e2) & exists e4 e3 x4.(Theme(e4,x3) & Actor(e4,x1) & v_have(e4) & Theme(e3,x4) & v_autograph(e3) & (x3 = x4)) & n_book(x3) & of(x3,x1) & n_thing(x1) & in(e1,x2) & n_line(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_2(x1))