CREATE TABLE table_name_22 (party VARCHAR(255), home_town VARCHAR(255), district VARCHAR(255), took_office VARCHAR(255))
What is Party, when District is less than 10, when Took Office is less than 1991, and when Home Town is Mount Pleasant?
    
SQL: SELECT party FROM table_name_22 WHERE district < 10 AND took_office < 1991 AND home_town = "mount pleasant"