What is the invention of the social entrepreneur whose life is the subject of an upcoming 2018 Indian film called 'Padman' ?
Padman:  The film is inspired from the life of Arunachalam Muruganantham. Arunachalam Muruganantham: Arunachalam Muruganantham (born 1962) is a social entrepreneur from Coimbatore in Tamil Nadu, India.
i don't know