Complex sentence: A bank representative comes by the tavern owned by Jack and Declan's father to tell Jack's father that the bank will foreclose on the tavern if the loan is not paid off by the end of the month.
Split into simpler sentences: A bank representative comes by the tavern owned by Jack and Declan's father. He tells Jack's father that the bank will foreclose on the tavern if the loan is not paid off by the end of the month.