what's the earliest year that the wimbledon opponent was zheng jie?
CREATE TABLE table_name_50 (year INTEGER, event VARCHAR, opponent VARCHAR)
SELECT MIN(year) FROM table_name_50 WHERE event = "wimbledon" AND opponent = "zheng jie"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_50 (year INTEGER, event VARCHAR, opponent VARCHAR) Question: what's the earliest year that the wimbledon opponent was zheng jie? [/INST] SELECT MIN(year) FROM table_name_50 WHERE event = "wimbledon" AND opponent = "zheng jie" </s>