Eight people enjoy the fun of rafts and the beauty of a waterfall.
The inmates are riding in a van.
The inmates cannot be riding in a van if they are at a waterfall.
exists e1 x1 x2 x3 x4 x5 x6.(n_beauty(x5) & n_fun(x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & subset_of(x5,x2) & of(x5,x6) & n_waterfall(x6) & subset_of(x3,x2) & of(x3,x4) & n_raft(x4) & n_people(x1) & card_eq_8(x1))
exists e1 x1 x2.(n_inmate(x1) & in(e1,x2) & n_van(x2) & Actor(e1,x1) & v_ride(e1))