Posted In Education By Mistake: Sale of Inherited House After 10 Years, Not Rented, Not Lived In

My Father-in-law passed away in 2010 and my wife and her sister and brother just sold the home in 2021.  The property was in all of their names. The money from the sale of the house was dispersed evenly amongst the four.  They owned it for almost 11 years. Never lived in it and never rented it. They just kept it up. Would this be considered a sale of a second home, inheritance or....?  I don't know how to report the income here.