What is the Battle with Bulgarian Commander Ivan Asen II?
CREATE TABLE table_name_21 (battle VARCHAR, bulgarian_commander VARCHAR)
SELECT battle FROM table_name_21 WHERE bulgarian_commander = "ivan asen ii"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_21 (battle VARCHAR, bulgarian_commander VARCHAR) Question: What is the Battle with Bulgarian Commander Ivan Asen II? [/INST] SELECT battle FROM table_name_21 WHERE bulgarian_commander = "ivan asen ii" </s>