Who was the winning driver when the grand Prix was at Belgian Grand Prix?
CREATE TABLE table_1137702_3 (winning_driver VARCHAR, grand_prix VARCHAR)
SELECT winning_driver FROM table_1137702_3 WHERE grand_prix = "Belgian grand_prix"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1137702_3 (winning_driver VARCHAR, grand_prix VARCHAR) Question: Who was the winning driver when the grand Prix was at Belgian Grand Prix? [/INST] SELECT winning_driver FROM table_1137702_3 WHERE grand_prix = "Belgian grand_prix" </s>