CREATE TABLE table_name_10 (runner_s__up VARCHAR2, margin_of_victory VARCHAR2, tournament VARCHAR2)

Who is the runner(s)-up for the Lady Carling Open with 3 strokes margin of victory?
SELECT runner_s__up FROM table_name_10 WHERE margin_of_victory = "3 strokes" AND tournament = "lady carling open"
SELECT "runner_s__up" FROM "table_name_10" WHERE "3 strokes" = "margin_of_victory" AND "lady carling open" = "tournament"