generate questions: In 1983 the historic old town in the centre of Bern became a UNESCO World Heritage Site. Bern is ranked among the world’s top ten cities for the best quality of life (2010).
In what year did the historic old town in the center of Bern become a UNESCO World Heritage Site? {sep_token} What is Bern's ranking for the best quality of life? {sep_token} Where is the UNESCO World Heritage Site located? {sep_token} In what year was Bern ranked as one of the 10 best cities for their quality of life? {sep_token} Where is the UNESCO World Heritage Site? {sep_token} Where does Bern rank for top cities for the best quality of life? {sep_token} When did the centre of Bern become the UNESCO World Heritage Site? {sep_token}