A woman serving a tennis ball.
A woman is playing tennis.
In order to serve a tennis ball, the woman must be playing tennis.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_serve(e1) & n_ball(x3) & of(x3,x4) & n_tennis(x4) & (x1 = x2) & n_woman(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2) & n_woman(x1))