Who is listed under mens singles when womens has wang nan zhang yining?
CREATE TABLE table_28138035_27 (mens_singles VARCHAR, womens_doubles VARCHAR)
SELECT mens_singles FROM table_28138035_27 WHERE womens_doubles = "Wang Nan Zhang Yining"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28138035_27 (mens_singles VARCHAR, womens_doubles VARCHAR) Question: Who is listed under mens singles when womens has wang nan zhang yining? [/INST] SELECT mens_singles FROM table_28138035_27 WHERE womens_doubles = "Wang Nan Zhang Yining" </s>