What is the title of legislator whose birthday on 2/20/1942?
birthday on 2/20/1942 refers to birthday_bio = '1942-02-20'
SELECT T2.title FROM current AS T1 INNER JOIN `current-terms` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T1.birthday_bio = '1942-02-20' GROUP BY T2.title