Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: What does Neville need to utilize in order to create a serum? Movie plot title: The Omega Man Movie plot: A science fiction thriller based on the 1954 novel "I am Legend" by Richard Matheson.Set in 1977, two years after biological warfare wiped out the entire world population, except for Robert Neville (Charlton Heston) and a few that have been mutated into light-sensitive flesh-eating psychopathic zombies who are partially blind. Convinced by their fanatic leader, former news broadcaster Matthias (Anthony Zerbe), that Neville personifies the twin evils of science and militarism. Neville remains safely barricaded in his elegant, downtown penthouse apartment, where he has hoarded food, liquor and fuel normalcy in spite of the catastrophe around him, Neville patrols the city by day, carrying a machine gun and recording any sign of the mutants' activity in hopes of finding and destroying them. After another evening of fighting off attacks led by Matthias and his cohort Zachary, Neville searches downtown in hope of tracking them down. Attempting to suppress his constant anxiety, Neville "shops" in a clothing store and is startled when he sees a young black woman attempting to blend in with the store mannequins. Neville chases the woman, but she escapes by running into a park. Exhausted, Neville trudges into a bar and hearing a noise, descends into the darkened wine cellar where he is attacked by a group of mutants who take him to Matthias. Matthias condemns Neville for not being one of his "family" because he is not infected and declares him "obsolete". Neville maintains that the mutants should organize and attempt to find a cure, but Matthias and the others declare Neville guilty and carry him outside to a cart where he is driven to an area just outside of the stadium. Lashing Neville to a tree, Matthias exhorts his followers to burn the scientist as the bodies of the the dead were burned after initial contamination. Suddenly the stadium lights come one, forcing the mutants to collapse in an effort to cover their sensitive eyes and skin. An unmutated young man appears and cuts Neville free, then guides him away to...
The answer to this question is:
Richie