Liens on Foreclosures

[Mikey Grabon]

So I'm new in real estate investing and my first investment that I want is a foreclosure. I'm trying to learn about liens and which ones are 1 mortgages and which liens survive the process of foreclosure. So when searching the properties that I'm interested I thought, hey I have a month subscription on https://www.neighborwho.com with unlimited searches so, I thought I would look up my mom's house and my sister home where she was the tenant. I noticed my sister had a lien on the house however, she's not the owner but the tenant. My question is if I purchase a house or a duplex with a lien in the tenant's name does that lien survive the foreclosure?