What are the first name and last name of the players who were paid salary by 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'