"It was one of my favorites there," [J. Andrew Greenblatt] says of the film written by Joseph Cedar - who won the festival's screenwriting award - that was picked up by Sony Classics at Cannes.That film hewed to the guidelines of quality work promulgated by Nationlight Production, a local house with an avowed goal of morally responsible work, Greenblatt says of the production company, in which he is a partner with, among others, Marc Erlbaum. Greenblatt says he admires Erlbaum and the company because their "mandate and mission has a Jewish sensibility" that infuses the themes and focus of works filmed."We're looking for short films by local filmmakers that incorporate one of 20 Philadelphia icons ? which can be locations, food ? into their films," Greenblatt says of the just-announced contest that will use Knight funds.