user: Question: Who has  a Home of Detroit on  April 22?
Columns: ['Game', 'Date', 'Visitor', 'Score', 'Home', 'Decision', 'Attendance', 'Series']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'April 22', 'Calgary', '2 – 1', 'Detroit', 'Joseph', 20066.0, '0 – 1']
SQL:

assistant: SELECT "Visitor" FROM "Table" WHERE "Home" = 'Detroit' AND "Date" = 'April 22';