What is the date of vacancy when the team is manchester city and replaced by is mark hughes?
CREATE TABLE table_10592536_8 (date_of_vacancy VARCHAR, team VARCHAR, replaced_by VARCHAR)
SELECT date_of_vacancy FROM table_10592536_8 WHERE team = "Manchester City" AND replaced_by = "Mark Hughes"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_10592536_8 (date_of_vacancy VARCHAR, team VARCHAR, replaced_by VARCHAR) Question: What is the date of vacancy when the team is manchester city and replaced by is mark hughes? [/INST] SELECT date_of_vacancy FROM table_10592536_8 WHERE team = "Manchester City" AND replaced_by = "Mark Hughes" </s>