when did the institution at chapel hill, North carolina join acc?
CREATE TABLE table_28744929_1 (joined_acc VARCHAR, location VARCHAR)
SELECT joined_acc FROM table_28744929_1 WHERE location = "Chapel Hill, North Carolina"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28744929_1 (joined_acc VARCHAR, location VARCHAR) Question: when did the institution at chapel hill, North carolina join acc? [/INST] SELECT joined_acc FROM table_28744929_1 WHERE location = "Chapel Hill, North Carolina" </s>