How many seats became avaliable in Massachusetts 3rd district?
CREATE TABLE table_224840_4 (vacator VARCHAR, district VARCHAR)
SELECT COUNT(vacator) FROM table_224840_4 WHERE district = "Massachusetts 3rd"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_224840_4 (vacator VARCHAR, district VARCHAR) Question: How many seats became avaliable in Massachusetts 3rd district? [/INST] SELECT COUNT(vacator) FROM table_224840_4 WHERE district = "Massachusetts 3rd" </s>