Final answer:
The superior lien would be the IRS lien dated June 12th, 2008. Property tax liens generally have the highest priority.
Step-by-step explanation:
The lien that would be superior over the others is the IRS lien dated June 12th, 2008.
In general, liens are ranked based on their priority, with the lien that is recorded first having the highest priority.
In this case, the IRS lien, being recorded after the mechanic's lien and the judgment lien, would have priority over both of them. However, it is important to note that property tax liens usually have the highest priority over other liens, regardless of when they were recorded. Therefore, the property tax lien dated January 1, 2009 would be superior to all the other liens mentioned.