The ball boys are waiting on the side lines of the tennis court while they watch the lady hitting the ball.
The lady hits the ball hard.
A lady hitting a ball is not always going to hit the ball hard.
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 s1 x1 x2.(n_ball(x2) & n_lady(x1) & a_hard(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hit(e1))