List player's first name and last name who received salary from team Washington Nationals in both 2005 and 2007?
SELECT T2.name_first ,  T2.name_last FROM salary AS T1 JOIN player AS T2 ON T1.player_id  =  T2.player_id JOIN team AS T3 ON T3.team_id_br  =  T1.team_id WHERE T1.year  =  2005 AND T3.name  =  'Washington Nationals' INTERSECT SELECT T2.name_first , T2.name_last FROM salary AS T1 JOIN player AS T2 ON T1.player_id  =  T2.player_id JOIN team AS T3 ON T3.team_id_br  =  T1.team_id WHERE T1.year  =  2007 AND T3.name  =  'Washington Nationals'
players who received salary from a specific team in both years = INTERSECT of salary records for the two years for the team; player's first name and last name = name_first, name_last; team 'Washington Nationals' = team.name; years 2005 and 2007 = salary.year;