A group of cyclists are racing in a velodrome.
girl plays hop scotch
He refers to group of cyclist which indicates more than the girl.  One would not be playing hopscotch while racing in a velodrome at the same time.
exists e1 x1 x2 x3.(in(e1,x3) & n_velodrome(x3) & Actor(e1,x1) & v_race(e1) & of(x1,x2) & n_cyclist(x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_scotch(x2) & of(x2,x3) & n_hop(x3) & n_girl(x1))