user: Question: How many times was the mens u20 recorded when the Womens 40 were Sydney Scorpions def North Queensland Cyclones?
Columns: ['Year', 'Mens Open', 'Womens Open', 'Mixed Open', 'Mens u20', 'Womens u20', 'Senior Mixed', 'Mens 30', 'Womens 30', 'Mens 35', 'Womens 35', 'Mens 40', 'Womens 40', 'Mens 45', 'Mens 50']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1997.0, 'Sydney Scorpions def Brisbane City Cobras', 'Brisbane City Cobras def Sydney Mets', 'Sydney Rebels def Brisbane City Cobras', 'Brisbane City Cobras def Gold Coast Sharks', 'Sunwest Razorbacks def Sydney Rebels', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A']
SQL:

assistant: SELECT COUNT("Mens u20") FROM "Table" WHERE "Womens 40" = 'Sydney Scorpions def North Queensland Cyclones';