the group of people in the river are using canoes are using their boating skills.
People are canoeing.
People canoeing are in the river using canoes while using their boating skills.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_skill(x6) & of(x6,x7) & n_boating(x7) & of(x6,x3) & n_thing(x3) & n_river(x3) & n_group(x1) & Theme(e2,x6) & Actor(e2,x1) & v_use(e2) & of(x1,x2) & in(x2,x3) & Theme(e1,x5) & Actor(e1,x4) & v_use(e1) & n_canoe(x5) & (x3 = x4) & n_people(x2))
exists e1 x1.(Actor(e1,x1) & v_canoe(e1) & n_people(x1))