Write SQL query to solve given problem: Which historical legislators are members of the National Greenbacker party? Write their first and last names.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.first_name, T2.last_name FROM `historical-terms` AS T1 INNER JOIN historical AS T2 ON T2.bioguide_id = T1.bioguide WHERE T1.party = 'National Greenbacker'