How many people are shown for mens doubles when guo yue played womens singles?
CREATE TABLE table_28138035_20 (mens_doubles VARCHAR, womens_singles VARCHAR)
SELECT COUNT(mens_doubles) FROM table_28138035_20 WHERE womens_singles = "Guo Yue"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28138035_20 (mens_doubles VARCHAR, womens_singles VARCHAR) Question: How many people are shown for mens doubles when guo yue played womens singles? [/INST] SELECT COUNT(mens_doubles) FROM table_28138035_20 WHERE womens_singles = "Guo Yue" </s>