user: Question: What is the weight when the race was the vrc melbourne cup?
Columns: ['Result', 'Race', 'Distance', 'Weight', 'Winner or 2nd', "Pos'n"]
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Won', 'WRC Underwood Stakes (wfa)', '8f', 9.0, 'Rondalina', '2nd']
SQL:

assistant: SELECT "Weight" FROM "Table" WHERE "Race" = 'vrc melbourne cup';