mary owns a small apartment complex.At the time Mary purchased the apartment complex fromSam, she gave Sam a mortgage securing a debt for $100,000.The mortgage was mentioned in the deed from Sam to Mary for the apartment complex, but the mortgage was not recorded.Mary sells the apartment complex to John.Mary does not tell John about the unrecorded mortgage to Sam.After the sale of the apartment complex from Mary to John, is the mortgage held by Sam enforceable against the apartment complex?