Tell the defensive work rate for Kevin Berigaud on 2013/2/22.
Kevin Berigaud refers to player_name = 'Kevin Berigaud'; on 2013/2/22 refers to date = '2013-02-22 00:00:00'
SELECT t2.defensive_work_rate FROM Player AS t1 INNER JOIN Player_Attributes AS t2 ON t1.player_fifa_api_id = t2.player_fifa_api_id WHERE SUBSTR(t2.`date`, 1, 10) = '2013-02-22' AND t1.player_name = 'Kevin Berigaud'