Girls are trying to hit the ball during a volleyball game.
A group of girls are walking in the shopping mall.
You wouldn't hit a ball while a a volleyball game if you're also walking through a shopping mall.
exists e1 p1 x1 x2.(n_ball(x2) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x3 x4.(during(e2,x3) & n_game(x3) & of(x3,x4) & n_volleyball(x4) & Theme(e2,x2) & Actor(e2,x1) & v_hit(e2)) & n_girl(x1))
exists e1 x1 x2 x3 x4.(n_mall(x3) & of(x3,x4) & n_shopping(x4) & in(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))