มีคะแนนกี่คะแนนจาก 35 คะแนนและแพ้น้อยกว่า 13 ครั้ง
How many Points have Goals against of 35, and less than 13 losses?
df = pd.DataFrame(columns=['points','goals_against', 'losses'])
df[df['goals_against'] == '35'][df['losses'] < '13']['points'].sum()