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"
### Context: CREATE TABLE table_1341453_40 (incumbent VARCHAR, first_elected VARCHAR) ### Question: How many incumbents were first elected in 1984?  ### Answer: SELECT COUNT(incumbent) FROM table_1341453_40 WHERE first_elected = "1984"