Table schema:
CREATE TABLE table_name_22 (party VARCHAR, home_town VARCHAR, district VARCHAR, took_office VARCHAR)

Question: 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"