A group of people on a boat paddle with oars.
There are people riding a boat
If people are on a boat, they are riding a boat.
exists x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & on(x2,x3) & with(x3,x5) & n_oar(x5) & n_paddle(x3) & of(x3,x4) & n_boat(x4) & n_people(x2) & n_group(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_boat(x4) & (x2 = x3) & n_people(x2))