A group of people are rafting on river rapids.
There are people outdoors.
One is outside when rafting on river rapids.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_rapid(x3) & of(x3,x4) & n_river(x4) & Actor(e1,x1) & v_raft(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 x2 x3.((x1 = x2) & Time(x2,x3) & n_outdoors(x3) & n_people(x2))