Small child is rollerskating while bicyclists ride around a track.
The child has on rollerskates.
If someone has on rollerskates then someone is rollerskates
exists e1 p1 s1 x1.(exists e2 x2 x3.(around(e2,x3) & n_track(x3) & Actor(e2,x2) & v_ride(e2) & n_bicyclist(x2)) & while(e1,p1) & Actor(e1,x1) & v_rollerskate(e1) & n_child(x1) & a_small(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_child(x1) & on(e1,x2) & n_rollerskate(x2) & Actor(e1,x1) & v_have(e1))