Seven people are wading in a natural pool.
Seven people are wading in a pool as the eighth watches from the shore.
Seven people in a pool does not imply there is an eighth that watches.
exists e1 s1 x1 x2.(in(e1,x2) & n_pool(x2) & a_natural(s1) & Theme(s1,x2) & Actor(e1,x1) & v_wade(e1) & n_people(x1) & card_eq_7(x1))
exists e1 s1 x1 x2 x3 x4.(n_shore(x3) & n_watch(x2) & a_eighth(s1) & Theme(s1,x2) & in(e1,x4) & n_pool(x4) & as(e1,x2) & from(x2,x3) & Actor(e1,x1) & v_wade(e1) & n_people(x1) & card_eq_7(x1))