user: Question: Who is the director of the game with Hiroshi Sato as the producer on the GBA platform?
Columns: ['Title', 'Year', 'Platform(s)', 'Director', 'Producer']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Napoleon 6', 2001.0, 'GBA', 'Masaki Tawara', 'Shinji Hatano']
SQL:

assistant: SELECT "Director" FROM "Table" WHERE "Producer" = 'Hiroshi Sato' AND "Platform(s)" = 'GBA';