The biker is riding around a curve in the road.
There is a bike on the road.
A biker rides a bike. A curve in the road is on the road.
exists e1 x1 x2 x3.(n_road(x3) & n_biker(x1) & in(e1,x3) & around(e1,x2) & n_curve(x2) & Actor(e1,x1) & v_ride(e1))
exists p1 x1 x3.(n_road(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_bike(x2)))