CREATE TABLE table_name_43 (date VARCHAR, surface VARCHAR, opponent VARCHAR)

What was the date of the tournament with a clay surface and an opponent of Irina Falconi?
SELECT date FROM table_name_43 WHERE surface = "clay" AND opponent = "irina falconi"
SELECT "date" FROM "table_name_43" WHERE "clay" = "surface" AND "irina falconi" = "opponent"