A group of people ride bicycles around a curve on a racetrack.
A group of people are riding scooters.
They either are riding bicycles or scooters.
exists e1 x1 x2 x3 x4 x5.(on(e1,x5) & n_racetrack(x5) & around(e1,x4) & n_curve(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_scooter(x3) & of(x1,x2) & n_people(x2) & n_group(x1))