A group of four women raft along a river.
Sisters rafting down the Colorado River.
Women rafting together don't have to be sisters, and they could be rafting down any river, not just the Colorado River.
exists x1 x2 x3 x4.(a_topic(x1) & along(x1,x4) & n_river(x4) & of(x1,x2) & n_raft(x2) & of(x2,x3) & n_woman(x3) & card_eq_4(x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(ne_geo_river(x3) & (x3 = x4) & ne_geo_colorado(x4) & a_topic(x1) & down(e1,x3) & Actor(e1,x2) & v_raft(e1) & (x1 = x2) & n_sister(x1))