user: Question: What is the promotion when The Arena was the venue and the event of Legends of the Arena?
Columns: ['Location', 'Venue', 'Promotion', 'Event', 'Inductee(s)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Philadelphia, Pennsylvania', 'ECW Arena', 'Pro-Pain Pro Wrestling', 'A Night for the Flyboy', 'Rocco Rock']
SQL:

assistant: SELECT "Promotion" FROM "Table" WHERE "Venue" = 'The Arena' AND "Event" = 'Legends of the Arena';