CREATE TABLE table_47118 ("Senator" TEXT, "Party" TEXT, "District" FLOAT, "Home Town" TEXT, "Took Office" FLOAT)

What is Party, when District is less than 10, when Took Office is less than 1991, and when Home Town is Mount Pleasant?
SELECT "Party" FROM table_47118 WHERE "District" < '10' AND "Took Office" < '1991' AND "Home Town" = 'mount pleasant'
SELECT "Party" FROM "table_47118" WHERE "District" < '10' AND "Home Town" = 'mount pleasant' AND "Took Office" < '1991'