user: Question: What is the original air date for the writer Tanaka Shinichi?
Columns: ['Episode', 'Title', 'Writer', 'Director', 'Original airdate', 'Ratings (Kanto)', 'Ratings (Kansai)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Faint (失神)', 'Noriko Goto', 'Kazuhisa Imai', 'Apr 6, 2010 22.00 - 23.09', '12.4', '14.5']
SQL:

assistant: SELECT "Original airdate" FROM "Table" WHERE "Writer" = 'Tanaka Shinichi';