ผลิตภัณฑ์ชื่อ "งาดำ" มีคุณสมบัติกี่ประการ?
How many characteristics does the product named "sesame" have?
df_product_characteristics = pd.DataFrame(columns=['product_id'])
df_products = pd.DataFrame(columns=['product_id', 'product_name'])
df_product_characteristics['product_id'].value_counts()[df_products[df_products['product_name'] == 'sesame']['product_id'].values[0]]