CREATE TABLE debate_people (debate_id DECIMAL, affirmative DECIMAL, negative DECIMAL, if_affirmative_win others)
CREATE TABLE debate (debate_id DECIMAL, date TEXT, venue TEXT, num_of_audience DECIMAL)
CREATE TABLE people (people_id DECIMAL, district TEXT, name TEXT, party TEXT, age DECIMAL)

List the names of people that have not been on the affirmative side of debates.
SELECT name FROM people WHERE NOT people_id IN (SELECT affirmative FROM debate_people)
SELECT "name" FROM "people" WHERE NOT "people_id" IN (SELECT "affirmative" FROM "debate_people")