Conversation so far:
when did the isle of man festival of motorcycling start
The MGP, which is organised by the Manx Motor Cycle Club, began life in 1923.
is the man of isle an island
An isle is an island; often used as part of an island's name, or in literary English.

Question: How is the island dependent?
Self-contained rewrite: How is the Isle of Man a Crown Dependency?