Eight people enjoying the rafts and waterfall in this swimming hole.
The group went swimming.
If there are eight people, then they must be the group, and if they are in a swimming hole they must be swimming.
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_hole(x6) & of(x6,x7) & n_swimming(x7) & n_waterfall(x5) & n_raft(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_enjoy(e1) & in(x3,x6) & (x1 = x2) & n_people(x1) & card_eq_8(x1))
exists e1 x1 x2.(n_group(x1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_swimming(x2))