user: ### NOW ANSWER:
Question: What is 17th c., when American is "ə"?
Columns: ['17th c.', 'American', 'British', 'Australian', 'Examples']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['ɐ', 'ə', 'ə', 'ə', 'amœba, anemone, ascesis']
SQL:

assistant: SELECT "17th c." FROM "Table" WHERE "American" = 'ə';