sentence: Modern tracks are made of concrete, coated with ice.
sentences_before: Bobsleigh World Cup Innsbruck-Igls 2011.'Bobsled' or 'bobsleigh' is a sport played during the Winter Olympic Games. It is played by riding on iced tracks with a sled.
sentences_after: Artificial bobsleigh tracks are also available.
concept_name: modern track
headings: Bobsleigh
categories: Winter Olympic sports Winter sports