How many times did  li ju win the womens singles and wang liqin win the mens singles?
CREATE TABLE table_28138035_6 (womens_doubles VARCHAR, womens_singles VARCHAR, mens_singles VARCHAR)
SELECT COUNT(womens_doubles) FROM table_28138035_6 WHERE womens_singles = "Li Ju" AND mens_singles = "Wang Liqin"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28138035_6 (womens_doubles VARCHAR, womens_singles VARCHAR, mens_singles VARCHAR) Question: How many times did  li ju win the womens singles and wang liqin win the mens singles? [/INST] SELECT COUNT(womens_doubles) FROM table_28138035_6 WHERE womens_singles = "Li Ju" AND mens_singles = "Wang Liqin" </s>