A group of people white water raft on very choppy water.
a couple was there
A couple can be considered a small group.
exists s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x4) & n_water(x4) & a_choppy(s1) & Theme(s1,x4) & r_very(x4) & n_white(x1) & n_water(x1) & Time(x1,x3) & n_raft(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 x1.(Theme(s1,x1) & a_there(s1) & n_couple(x1))