Three people sit on the end of a pier.
There are people on the pier.
Sitting is a form of being on something.
exists e1 x1 x2 x3.(n_end(x2) & on(e1,x2) & of(x2,x3) & n_pier(x3) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_3(x1))
exists p1 x1 x3.(n_pier(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_people(x2)))