Name a sport where people wear helmets.
| 1 | Football | 57 |
|---|---|---|
| 1 | football | |
| 2 | Hockey | 22 |
| 2 | ice hockey | |
| 2 | hockey | |
| 3 | softball field | |
| 3 | hardball | |
| 3 | fastball | |
| 3 | baseball | |
| 4 | biking | |
| 4 | riding bike | |
| 4 | cycling | |
| 5 | racing | |
| 5 | nascar | |
| 5 | auto racing | |
| 5 | car racing | |
| 5 | grand prix | |
| 5 | formula one | |
| 6 | dirt biking | |
| 6 | motocross |