CREATE TABLE table_name_21 (score VARCHAR, goal VARCHAR, result VARCHAR, competition VARCHAR)

Which Score has a Result of 2 1, and a Competition of friendly, and a Goal smaller than 17?
SELECT score FROM table_name_21 WHERE result = "2–1" AND competition = "friendly" AND goal < 17
SELECT "score" FROM "table_name_21" WHERE "2–1" = "result" AND "competition" = "friendly" AND "goal" < 17