Several crew teams rowing down a river.
People are in a boat outdoors.
crew is a form of boating, and rivers are only outdoors
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_row(e1) & n_river(x4) & (x1 = x3) & n_team(x1) & of(x1,x2) & n_crew(x2) & a_several(s1) & Theme(s1,x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_outdoors(x2) & of(x2,x3) & n_boat(x3)) & n_people(x1))