SCHEMA:
CREATE TABLE table_name_70 (winner VARCHAR, runner_up VARCHAR, week_of VARCHAR, semi_finalists VARCHAR)
USER:
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?

QUERY:
SELECT winner FROM table_name_70 WHERE week_of = "8 may" AND semi_finalists = "helena suková mary pierce" AND runner_up = "conchita martínez patricia tarabini"