Two girls enjoy themselves on a swing ride.
The girls are best friends.
girls enjoying on a swing ride need not to be a best friends.
exists e1 x1 x2 x3 x4.(n_group(x2) & on(e1,x3) & n_ride(x3) & of(x3,x4) & n_swing(x4) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_girl(x1) & card_eq_2(x1))
exists p1 x1.(n_girl(x1) & exists s1 x2.((x1 = x2) & n_friend(x2) & r_most(s1) & a_good(s1) & Theme(s1,x2)))