Two boys are fishing on a pier next to a boat dock.
A pair of boys float on inner tubes.
Anyone standing on a pier is not on inner tubes.
exists e1 x1 x2 x3 x4 x5.(on(e1,x2) & to(x3,x4) & n_dock(x4) & of(x4,x5) & n_boat(x5) & next(x2,x3) & n_thing(x3) & n_pier(x2) & Actor(e1,x1) & v_fish(e1) & n_boy(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_tube(x3) & a_inner(s1) & Theme(s1,x3) & Actor(e1,x1) & v_float(e1) & of(x1,x2) & n_boy(x2) & n_pair(x1))