A group of tennis players talking.
The tennis player is hitting a ball with a bat.
When players are talking , they cannot be hitting a ball.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Actor(e1,x4) & v_talk(e1) & (x1 = x4) & of(x1,x2) & n_player(x2) & of(x2,x3) & n_tennis(x3) & n_group(x1))
exists e1 x1 x2 x3 x4.(n_player(x1) & of(x1,x2) & n_tennis(x2) & Theme(e1,x3) & Actor(e1,x1) & v_hit(e1) & with(x3,x4) & n_bat(x4) & n_ball(x3))