Parcels Under PART of Homes or Businesses

[Arnold Finkelstein]

I have, yet again, found a delinquent parcel (often deeds) upon which part of a home or business rests.  In this case, half of the home sits on this parcel, which the county has assessed as only land.  

Is there an investment strategy here?  I'd be happy to sell it back to the owner, but assuming one wanted to go so far as to file an ejectment (which I probably don't), I assume you can't eject someone from half of a house, or 1/5 of a business, or split it up like that terrific I Love Lucy episode.  What is the strategy in these cases?