user: Question: Which Date has a Tournament of National Jewish Hospital Open, and a Runner(s)-up of Pat Bradley?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['May 16, 1971', 'Sealy LPGA Classic', '–3 (77-69-72-71=289)', '2 strokes', 'Donna Caponi']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Tournament" = 'National Jewish Hospital Open' AND "Runner(s)-up" = 'Pat Bradley';