user: Question: How many categories of Senate Seats does Emile Roemer have? 
Columns: ['Name', 'Abbr.', 'Political Leader', 'International Affiliation', 'Votes ( 2012 )', 'House of Rep. seats', 'Senate seats', 'European Parliament seats']
Types: ['text', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Labour Party Partij van de Arbeid', 'PvdA', 'Diederik Samsom', 'Socialist International , PES', 2331862.0, 38.0, 14.0, 3.0]
SQL:

assistant: SELECT "Senate seats" FROM "Table" WHERE "Political Leader" = 'Emile Roemer';