How was Francesco Migliore's attacking work rate on 2015/5/1?
Francesco Migliore's  refers to player_name = 'Francesco Migliore'; on 2015/5/1 refers to date = '2015-05-01 00:00:00'
SELECT t2.attacking_work_rate FROM Player AS t1 INNER JOIN Player_Attributes AS t2 ON t1.player_api_id = t2.player_api_id WHERE SUBSTR(t2.`date`, 1, 10) = '2015-05-01' AND t1.player_name = 'Francesco Migliore'