system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Tell me whether these sports require a ball or not to play: basketball, hockey, track and field, soccer, surfing, water polo, karate, football, gymnastics, skateboarding, golf, tennis, boxing, baseball, rugby, weightlifting, softball, rowing


assistant
Basketball, soccer, water polo, football, golf, tennis, baseball, rugby, and softball require a ball to play. Hockey, track and field, surfing, karate, gymnastics, skateboarding, boxing, weightlifting, and rowing do not require a ball.