What episode number is presented by Ben Okri ?
CREATE TABLE table_15211468_3 (episode_no VARCHAR, presenter VARCHAR)
SELECT episode_no FROM table_15211468_3 WHERE presenter = "Ben Okri"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15211468_3 (episode_no VARCHAR, presenter VARCHAR) Question: What episode number is presented by Ben Okri ? [/INST] SELECT episode_no FROM table_15211468_3 WHERE presenter = "Ben Okri" </s>