concepts: helmet motorcycle ride road
target: John wore his helmet when riding his motorcycle on the road.
references: John wore his helmet when riding his motorcycle on the road. Adult  ride their motorcycle with their helmet on  their  head in the road Wear a helmet when you ride the motorcycle on the road The girl will wear a helmet when she rides her motorcycle on the road. The man knows if he wants to ride a motorcycle, it's important to wear a helmet on the road. A man in a helmet riding a motorcycle on a dirt road.