the group of people in the river are using canoes are using their boating skills.
The people are good friends.
The group of people are not necessarily good friends just because the are in the river together.
exists e2 e1 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 p1 x1.(n_people(x1) & exists s1 x2.((x1 = x2) & n_friend(x2) & a_good(s1) & Theme(s1,x2)))