Four children playing in a pool.
Four toddlers are splashing in an inflatable pool.
Not all children are toddlers and the pool they are playing in isn't necessarily an inflatable pool.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_pool(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1) & card_eq_4(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_pool(x2) & a_inflatable(s1) & Theme(s1,x2) & Actor(e1,x1) & v_splash(e1) & n_toddler(x1) & card_eq_4(x1))