Children play in a pool while adults look on.
Children play in a pool.
The adults are looking on so only the children are playing in the pool.
(x)
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_pool(x3) & n_play(x1) & (x1 = x2) & ne_nam_children(x2))