How many incumbents were first elected in 1984? 
CREATE TABLE table_1341453_40 (incumbent VARCHAR, first_elected VARCHAR)
SELECT COUNT(incumbent) FROM table_1341453_40 WHERE first_elected = "1984"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1341453_40 (incumbent VARCHAR, first_elected VARCHAR) Question: How many incumbents were first elected in 1984?  [/INST] SELECT COUNT(incumbent) FROM table_1341453_40 WHERE first_elected = "1984" </s>