CREATE TABLE table_12338 ("17th c." CLOB, "American" CLOB, "British" CLOB, "Australian" CLOB, "Examples" CLOB)

What is 17th c., when American is ' '?
SELECT "17th c." FROM table_12338 WHERE "American" = 'ə'
SELECT "17th c." FROM "table_12338" WHERE "American" = 'ə'