List down the long name for slow speed class team.
slow speed class refers to buildUpPlaySpeedClass = 'Slow'; long name refers to team_long_name
SELECT DISTINCT t1.team_long_name FROM Team AS t1 INNER JOIN Team_Attributes AS t2 ON t1.team_api_id = t2.team_api_id WHERE t2.buildUpPlaySpeedClass = 'Slow'