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.