user: Question: When was the game developed by Microvision released?
Columns: ['English Title/Translation', 'Japanese Title', 'Developer', 'Publisher', 'Genre', 'Console(s)', 'Initial Release Date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Ranma ½', 'Ranma ½ Kakuren Bodesu Match', 'Banpresto', 'Banpresto', 'Puzzle (Maze)', 'Game Boy JP', '1990/06/28 June 28, 1990']
SQL:

assistant: SELECT "Initial Release Date" FROM "Table" WHERE "Developer" = 'Microvision';