Several girls are playing a sport.
A group of friends are playing their favorite sport
The girls are not necessarily friends.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_sport(x2) & n_girl(x1) & a_several(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_sport(x3) & a_favorite(s1) & Theme(s1,x3) & of(x3,x1) & n_thing(x1) & of(x1,x2) & n_friend(x2) & n_group(x1))