A group of boaters boating down a winding waterway.
The group canoes down the river.
Boating does not imply that the group canoes.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_boat(e1) & n_waterway(x4) & of(x4,x5) & n_winding(x5) & (x1 = x3) & of(x1,x2) & n_boater(x2) & n_group(x1))
exists e1 x1 x2.(n_river(x2) & n_group(x1) & down(e1,x2) & Actor(e1,x1) & v_cano(e1))