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_1971074_1 (joined VARCHAR, location VARCHAR)
### Question:
In how many different years did schools located in Logan Township, Pennsylvania join the Conference?
### Answer:
SELECT COUNT(joined) FROM table_1971074_1 WHERE location = "Logan Township, Pennsylvania"