The ball boys are waiting on the side lines of the tennis court while they watch the lady hitting the ball.
The ball boys are collecting balls that have rolled away.
The lady cannot be hitting the ball that have rolled away.
exists e1 p1 x1 x2 x3 x4 x5 x6 x7.(n_ball(x2) & n_ball(x2) & n_lady(x7) & n_thing(x3) & n_court(x5) & of(x5,x6) & n_tennis(x6) & n_line(x3) & of(x3,x4) & n_side(x4) & n_boy(x1) & of(x1,x2) & exists e3 e2 x8.(Theme(e3,x7) & Actor(e3,x3) & v_watch(e3) & Theme(e2,x2) & Actor(e2,x8) & v_hit(e2) & (x7 = x8)) & while(e1,p1) & on(e1,x3) & of(x3,x5) & Actor(e1,x1) & v_wait(e1))
exists e1 e2 p1 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_collect(e2) & exists s1.(Theme(s1,x3) & a_away(s1)) & Topic(e1,p1) & Actor(e1,x3) & v_roll(e1) & (x2 = x3) & n_ball(x2) & n_ball(x2) & n_boy(x1) & of(x1,x2))