human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Date, Tournament, Winning score, To par, Margin of victory, Runner-up
###Question: A tournament on which date has a margin of victory of 2 strokes and a par of −16?
gpt
SELECT Date FROM table WHERE Margin of victory = 2 strokes AND To par = −16