user: Question: What is the aggregate number of Position that has a Bike No of 4?
Columns: ['Position', 'Driver / Passenger', 'Equipment', 'Bike No', 'Points']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Daniël Willemsen / Kenny van Gaalen', 'Zabel -WSP', 1.0, 452.0]
SQL:

assistant: SELECT COUNT("Position") FROM "Table" WHERE "Bike No" = 4.0;