Owner has a 2 year lease

[Allan Snow]

Not sure if anyone has heard this before but hopefully someone can help me. This multi family house that I'm interested in buying, the owner occupant has a 2 year lease. I have never heard of a 2 year lease on a renter (which he will be when he sells) before let alone an owner having a lease. I don't know the particulars of the lease yet, it is just in the house description. I know I can negotiate it out of the deal but Is there anyway to get rid of him if I buy it if he won't cancel the lease? Thx