user: Question: When were the credentials presented for New Jersey with a status of Foreign Service officer?
Columns: ['Name', 'State', 'Status', 'Title', 'Appointment', 'Credentials Presented']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Henry F. Grady', 'California', 'Non-career appointee', 'Ambassador Extraordinary and Plenipotentiary', 'Apr 10, 1947', 'Jul 1, 1947']
SQL:

assistant: SELECT "Credentials Presented" FROM "Table" WHERE "State" = 'New Jersey' AND "Status" = 'Foreign Service officer';