Write SQL query to solve given problem: List the full name of all the senior senators in year 2013.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.official_full_name FROM `current-terms` AS T1 INNER JOIN current AS T2 ON T2.bioguide_id = T1.bioguide WHERE T1.state_rank = 'senior' AND T1.type = 'sen' AND T1.start LIKE '2013%'