user: Question: What is the constituency number with a reserved for ( SC / ST /None) of None, for Katol?
Columns: ['Constituency number', 'Name', 'Reserved for ( SC / ST /None)', 'District', 'Number of electorates (2009)']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['48', 'Katol', 'None', 'Nagpur', 245811.0]
SQL:

assistant: SELECT "Constituency number" FROM "Table" WHERE "Reserved for ( SC / ST /None)" = 'None' AND "Name" = 'Katol';