มีแสตมป์กี่ดวงที่ออกแบบมาสำหรับธีม XII Summit de la Francophonie?
How many stamps were designed for the theme of XII Summit de la Francophonie?
df = pd.DataFrame(columns=['design', 'theme'])
df[df['theme'] == 'XII Summit de la Francophonie']['design'].count()