Several girls are playing a sport.
Some girls are engaging in a sport activity
PLAYING AND ENGAGING IN ARE THE SAME.
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 x1 x2 x3.(in(e1,x2) & n_activity(x2) & of(x2,x3) & n_sport(x3) & Actor(e1,x1) & v_engage(e1) & n_girl(x1))