user: Question: Decision of Parent, and a Home of Philadelphia, and a Record of 20–16–7 is on what date?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Decision', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['January 4', 'Boston', '3 – 2', 'Philadelphia', 'Parent', 10097.0, '17–13–5']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Decision" = 'Parent' AND "Home" = 'Philadelphia' AND "Record" = '20–16–7';