แสดงรายการรหัสของปัญหาจากผลิตภัณฑ์ "voluptatem" ที่รายงานหลังปี 1995
List the ids of the problems from the product "voluptatem" that are reported after 1995?
df_problems = pd.DataFrame({'problem_id': ['p_id1', 'p_id2', 'p_id3'], 'product_id': ['id1', 'id2', 'id3'], 'date_problem_reported': ['1994-01-01', '1996-01-01', '1997-01-01']})
df_product = pd.DataFrame({'product_id': ['id1', 'id2', 'id3'], 'product_name': ['voluptatem', 'product2', 'product3']})
df_problems.loc[(df_problems['product_id'].isin(df_product[df_product['product_name'] == 'voluptatem']['product_id'])) & (df_problems['date_problem_reported'] > '1995-12-31')]['problem_id']