user: Question: What year has John Davies as the runner-up, with Warren Humphreys as the winner?
Columns: ['Year', 'Venue', 'Winner', 'Runner-up', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2013', 'Frilford Heath Golf Club Red & Blue courses', 'Callum Shinkwin', 'Matthew Fitzpatrick', '4 & 3']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Runner-up" = 'John Davies' AND "Winner" = 'Warren Humphreys';