What date was the surface hard and Eva Hrdinová was the opponent?
CREATE TABLE table_name_40 (date VARCHAR, surface VARCHAR, opponent VARCHAR)
SELECT date FROM table_name_40 WHERE surface = "hard" AND opponent = "eva hrdinová"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_40 (date VARCHAR, surface VARCHAR, opponent VARCHAR) Question: What date was the surface hard and Eva Hrdinová was the opponent? [/INST] SELECT date FROM table_name_40 WHERE surface = "hard" AND opponent = "eva hrdinová" </s>