India, Aug. 2 -- For many Indians - and it is a common experience for most college students - a conversation about caste is often a conversation only about reservations. Why reservation in education and jobs for people from historically backward castes is wrong? Or why is it right? Writer-director Akshay Parvatkar, 30, has had that experience all his life, and it became the fuel for his impassioned story in 'Hanging by a Thread', a film that ends with a rousing Dalit poem entreating and evoking the end of caste by Goa's poet-politician Vishnu Surya Wag. "I got admission into college through reservation, but caste was never a big factor for me growing up. My father, a teacher, and mother, who had a government job, kept me shielded from the...