Rowing regattas ORGANIZATION@1 , held every year on the river LOCATION@1 is the most prestigious MISC@1 event LOCATION@2 , held every year on LOCATION@3 in LOCATION@4 , LOCATION@5 , LOCATION@6 's oldest annual sporting event .

Rowing regattas ORGANIZATION@1 , held every year on the river LOCATION@1 is the most prestigious MISC@1 event The Boat Race is a rowing race between the ORGANIZATION@2 and the ORGANIZATION@3 .
