Placing objects either left or right

Hi, for our (rail) scenarios, we want to place objects close to the (ego) track. Based on examples in the Scenic repo I came up with (simplified):

ego = new Train

spot = new OrientedPoint following ego_track for Range(100, 200)

person_on_track = new Person right of spot by Range(3, 6)

This is easy to read. However, we also want to place objects on the left side of the track.

Question: how can I place objects on either the left or right side of the ego track within the same scenario. Is that possible?