There is a girl on a unicycle and a child on a scooter.
Two children are riding on a unicycle and scooter.
A girl on a unicycle and a child on a scooter are two children riding a unicycle and a scooter.
exists p1 x1 x2 x3 x4 x5 x6.((x1 = x2) & subset_of(x5,x2) & on(x5,x6) & n_scooter(x6) & n_child(x5) & subset_of(x3,x2) & on(x3,x4) & n_unicycle(x4) & n_girl(x3))
exists e1 x1 x2 x3 x4.(on(e1,x2) & n_scooter(x4) & n_unicycle(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_ride(e1) & n_child(x1) & card_eq_2(x1))