A person hits a yellow volleyball over the net to her opponent in a pool.
People are playing in a pool.
Just because a person hits a volley ball to her opponent doesn't imply that they are playing.
exists e1 s1 x1 x2 x3 x4 x5.(n_opponent(x4) & of(x4,x3) & n_female(x3) & n_net(x3) & in(e1,x5) & n_pool(x5) & to(e1,x4) & over(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_hit(e1) & n_volleyball(x2) & a_yellow(s1) & Theme(s1,x2) & n_person(x1))
exists e1 x1 x2.(in(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_play(e1) & n_people(x1))