The blonde tennis player is wearing a white shirt and a green tennis skirt.
The person has a grass stain on their white shirt.
There is no evidence that the player is playing on a grass surface, that they have yet played, or if they will be taking part in a game anytime soon. So, there's nothing to indicate that there would be a grass stain.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & subset_of(x5,x3) & n_skirt(x5) & of(x5,x2) & n_tennis(x2) & n_tennis(x2) & a_green(s3) & Theme(s3,x5) & subset_of(x4,x3) & n_shirt(x4) & a_white(s2) & Theme(s2,x4) & n_player(x1) & of(x1,x2) & a_blonde(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_shirt(x4) & a_white(s1) & Theme(s1,x4) & of(x4,x1) & n_thing(x1) & n_person(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & on(x2,x4) & n_stain(x2) & of(x2,x3) & n_grass(x3))