What is the twitter name of the legislator whose birthday was on 5/27/1946?
birthday on 5/27/1946 refers to birthday_bio = '1946-05-27'
SELECT T2.twitter FROM current AS T1 INNER JOIN `social-media` AS T2 ON T2.bioguide = T1.bioguide_id WHERE T1.birthday_bio = '1946-05-27'