user: Question: What number episode was Week 4, Part 2?
Columns: ['Episode Number', 'Episode', 'Original Airdate', 'Rating', 'Share', 'Rating/Share (18–49)', 'Viewers (millions)', 'Weekly Rank']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['10.01', 'Week 1', 'March 22, 2010', '15.0', '23', '6.4', '24.19', 2.0]
SQL:

assistant: SELECT "Episode Number" FROM "Table" WHERE "Episode" = 'Week 4, Part 2';