A boy jumps into a pool while lifeguards watch.
A boy sunbathes at the pool.
One cannot jump into a pool and sunbathe at the pool simultaneously.
exists e1 p1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_watch(e2) & n_lifeguard(x3)) & while(e1,p1) & into(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_jump(e1) & n_boy(x1))
exists e1 x1 x2.(n_pool(x2) & at(e1,x2) & Actor(e1,x1) & v_sunbathe(e1) & n_boy(x1))