Question: What is the invention of the social entrepreneur whose life is the subject of an upcoming 2018 Indian film called 'Padman' ?
{'answer': 'low-cost sanitary pad making machine', 'supporting_facts': [['Padman', 0], ['Padman', 2], ['Arunachalam Muruganantham', 0], ['Arunachalam Muruganantham', 1]]}