Who won the Men's Doubles when Guo Xin won the Women's Singles?
CREATE TABLE table_12164707_1 (mens_doubles VARCHAR, womens_singles VARCHAR)
SELECT mens_doubles FROM table_12164707_1 WHERE womens_singles = "Guo Xin"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12164707_1 (mens_doubles VARCHAR, womens_singles VARCHAR) Question: Who won the Men's Doubles when Guo Xin won the Women's Singles? [/INST] SELECT mens_doubles FROM table_12164707_1 WHERE womens_singles = "Guo Xin" </s>