What is the IcAO of Frankfurt?
CREATE TABLE table_name_91 (icao VARCHAR, city VARCHAR)
SELECT icao FROM table_name_91 WHERE city = "frankfurt"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_91 (icao VARCHAR, city VARCHAR) Question: What is the IcAO of Frankfurt? [/INST] SELECT icao FROM table_name_91 WHERE city = "frankfurt" </s>