<p>Marcilio Filho is a Brazilian immigrant, in the country illegally, who works three jobs to support his family. Patrick O'Brien, also a husband and father, is a landscaper who is losing customers to Filho, who can charge less because he doesn't pay taxes. These two fictional characters clash in Hopkinton resident Karen Webb's "Green Grass," which won second prize for short screenplays in the 2007 Vail Film Festival Screenwriting Competition.</p>