ผู้เข้าร่วม escuderia bandeirantes ก่อนปี 1952 ได้คะแนนเท่าใด
What is the number of points for the Entrant of escuderia bandeirantes earlier than 1952?
df = pd.DataFrame(columns=['points', 'entrant', 'year'])
df.loc[(df['entrant'] == 'escuderia bandeirantes') & (df['year'] < 1952), 'points'].sum()