user: Question: What is the time when the race was in Kenya and Lineth Chepkurui was the athlete?
Columns: ['Rank', 'Time', 'Athlete', 'Nation', 'Date', 'Race']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', '30:21', 'Paula Radcliffe', 'United Kingdom', '23 February 2003', "World's Best 10K"]
SQL:

assistant: SELECT "Time" FROM "Table" WHERE "Nation" = 'Kenya' AND "Athlete" = 'Lineth Chepkurui';