CREATE TABLE table_name_29 (party VARCHAR, term_of_office VARCHAR, state VARCHAR)

What party has a term of office of 1951 1966, and a State of sa?
SELECT party FROM table_name_29 WHERE term_of_office = "1951–1966" AND state = "sa"
SELECT "party" FROM "table_name_29" WHERE "1951–1966" = "term_of_office" AND "sa" = "state"