Children in bathing suits play.
Children are playing at the pool.
Just because children are in bathing suits and playing does not mean that they are playing at a pool.
exists e2 e1 x1 x2 x3.(Actor(e2,x1) & v_play(e2) & Theme(e1,x3) & Actor(e1,x2) & v_bath(e1) & n_suit(x3) & (x1 = x2) & n_child(x1))
exists e1 x1 x2.(n_pool(x2) & at(e1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))