user: Question: What is the number of Position when the team was são paulo railway and the against is less than 46?
Columns: ['Position', 'Team', 'Points', 'Played', 'Drawn', 'Lost', 'Against', 'Difference']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: [1.0, 'São Paulo', 37.0, 20.0, 3.0, 0.0, 20.0, '42']
SQL:

assistant: SELECT COUNT("Position") FROM "Table" WHERE "Team" = 'são paulo railway' AND "Against" < 46.0;