What is the name of the different car makers who produced a car in 1970?
SELECT DISTINCT T1.Maker FROM CAR_MAKERS AS T1 JOIN MODEL_LIST AS T2 ON T1.Id  =  T2.Maker JOIN CAR_NAMES AS T3 ON T2.model  =  T3.model JOIN CARS_DATA AS T4 ON T3.MakeId  =  T4.id WHERE T4.year  =  '1970';
SELECT DISTINCT T1.Maker FROM CAR_MAKERS AS T1 JOIN MODEL_LIST AS T2 ON T1.Id  =  T2.Maker JOIN CAR_NAMES AS T3 ON T2.model  =  T3.model JOIN CARS_DATA AS T4 ON T3.MakeId  =  T4.id WHERE T4.year  =  '1970';
[{'Maker': 'gm'}, {'Maker': 'chrysler'}, {'Maker': 'amc'}, {'Maker': 'ford'}, {'Maker': 'citroen'}, {'Maker': 'toyota'}, {'Maker': 'nissan'}, {'Maker': 'volkswagen'}, {'Maker': 'peugeaut'}, {'Maker': 'saab'}, {'Maker': 'bmw'}]