A group of cheerleaders are cheering on a field.
Two girls riding bikes.
A group is more than two. Riding bikes incorporates  different skills than cheering on a field.
exists e1 x1 x2 x3.(on(e1,x3) & n_field(x3) & Actor(e1,x1) & v_cheer(e1) & of(x1,x2) & n_cheerleader(x2) & n_group(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & (x1 = x2) & n_girl(x1) & card_eq_2(x1))