What is the American sound that has a 17th century equivalent of ?
CREATE TABLE table_60996 (
    "Semi-closed initial unstressed vowels" text,
    "17th c." text,
    "American" text,
    "Australian" text,
    "Examples" text
)
SELECT "American" FROM table_60996 WHERE "17th c." = 'ɔ'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the American sound that has a 17th century equivalent of ? ### Input: CREATE TABLE table_60996 (
    "Semi-closed initial unstressed vowels" text,
    "17th c." text,
    "American" text,
    "Australian" text,
    "Examples" text
) ### Response: SELECT "American" FROM table_60996 WHERE "17th c." = 'ɔ'