[{"role": "user", "content": "I'm trying to communicate with a friend from Italy about a mutual acquaintance, and I was wondering how I could say 'I know your sister' in Italian so we can have a smooth conversation."}, {"role": "assistant", "content": "To say 'I know your sister' in Italian, you can use the phrase 'Io conosco tua sorella.' This should help you have a smooth conversation with your friend from Italy."}]