Table schema:
CREATE TABLE table_name_6 (date VARCHAR, margin_of_victory VARCHAR, runner_s__up VARCHAR)

Question: On what Date was Carole Charbonnier a Runner(s)-up with a 1 stroke Margin of victory?
SQL: SELECT date FROM table_name_6 WHERE margin_of_victory = "1 stroke" AND runner_s__up = "carole charbonnier"