What are the titles of segment a for series episode 21-12?
CREATE TABLE table_15187735_21 (segment_a VARCHAR, series_ep VARCHAR)
SELECT segment_a FROM table_15187735_21 WHERE series_ep = "21-12"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15187735_21 (segment_a VARCHAR, series_ep VARCHAR) Question: What are the titles of segment a for series episode 21-12? [/INST] SELECT segment_a FROM table_15187735_21 WHERE series_ep = "21-12" </s>