A woman is playing tennis while sitting down in the grass.
A woman sits in the grass while hitting a tennis ball with a tennis racket.
Answer: Playing tennis refers to hitting a tennis ball with a tennis racket.
exists e2 e1 s1 x1 x2 x3.(n_grass(x3) & while(e1,e2) & in(e2,x3) & a_down(s1) & Manner(e2,s1) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2) & n_woman(x1))
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_grass(x2) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hit(e2) & with(x3,x5) & n_racket(x5) & of(x5,x6) & n_tennis(x6) & n_ball(x3) & of(x3,x4) & n_tennis(x4) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))