Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1973842_1 (joined VARCHAR, location VARCHAR)
### Question:
On how many different dates did schools from Chestnut Hill, Massachusetts join the conference?
### Answer:
SELECT COUNT(joined) FROM table_1973842_1 WHERE location = "Chestnut Hill, Massachusetts"