generate questions: The history of pubs can be traced back to Roman taverns, through the Anglo-Saxon alehouse to the development of the modern tied house system in the 19th century.
How far back does the history of pubs go back? {sep_token} What was the Anglo-Saxon pup called? {sep_token} What is a pub tied to in the 19th century? {sep_token} What Roman businesses were analogous to modern day pubs? {sep_token} What similar establishments existed in the Anglo-Saxon world? {sep_token} In what century did the tied house system develop? {sep_token}