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_261931_2 (joined VARCHAR, location VARCHAR)
### Question:
When did the institution located in Lewiston, Maine join the conference? 
### Answer:
SELECT joined FROM table_261931_2 WHERE location = "Lewiston, Maine"