user: Question: How many races did the Formula Three Euroseries Signature team have?
Columns: ['Season', 'Series', 'Team', 'Races', 'Wins', 'Poles', 'F/Laps', 'Points', 'Position']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'real', 'text', 'text']
Sample row: ['2006', 'Eurocup Formula Renault 2.0', 'Prema Powerteam', 14.0, 0.0, 0.0, 0.0, '8', '21st']
SQL:

assistant: SELECT SUM("Races") FROM "Table" WHERE "Series" = 'Formula Three Euroseries' AND "Team" = 'Signature';