What was the purse when the trainer was Aidan O'Brien?
CREATE TABLE table_name_21 (purse VARCHAR, trainer VARCHAR)
SELECT purse FROM table_name_21 WHERE trainer = "aidan o'brien"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_21 (purse VARCHAR, trainer VARCHAR) Question: What was the purse when the trainer was Aidan O'Brien? [/INST] SELECT purse FROM table_name_21 WHERE trainer = "aidan o'brien" </s>