user: Question: What is Winner, when Week is 8 May, when Semi Finalists is Helena Suková Mary Pierce, and when Runner-Up is Conchita Martínez Patricia Tarabini?
Columns: ['Week of', 'Tier', 'Winner', 'Runner-up', 'Semi finalists']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1 May', 'Tier II', 'Conchita Martínez 6–1, 6–0', 'Martina Hingis', 'Anke Huber Magdalena Maleeva']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Week of" = '8 May' AND "Semi finalists" = 'Helena Suková Mary Pierce' AND "Runner-up" = 'Conchita Martínez Patricia Tarabini';