Add boundary relation (admin_level=7) for Adams Township, Champaign County, Ohio.

Wikipedia article on the township:

https://en.wikipedia.org/wiki/Adams_Township,_Champaign_County,_Ohio

Census info on the township:

https://test.data.census.gov/profile/Adams_township,_Champaign_County,_Ohio?g=060XX00US3902100212

Official census map with township boundaries:

https://data.census.gov/map/060XX00US3902100212