user: Question: what is the number of the episode where Maria McErlane where gramer guest
Columns: ['Episode', 'First broadcast', 'Graemes guest', 'Jeremys guest', 'Votes (%)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1x01', '27 February 1998', 'Maria McErlane', 'Tony Hawks', '75–25']
SQL:

assistant: SELECT "Episode" FROM "Table" WHERE "Graemes guest" = 'Maria McErlane';