<Li> Bryan Burk (VII) </Li> <Li> Ram Bergman (VIII) </Li> <Li> Michelle Rejwan (IX) </Li> <Tr> <Th> Screenplay by </Th> <Td> <Ul> <Li> Lawrence Kasdan (VII) </Li> <Li> J.J. Abrams (VII, IX) </Li> <Li> Michael Arndt (VII) </Li> <Li> Rian Johnson (VIII) </Li> <Li> Chris Terrio (IX) </Li> </Ul> </Td> </Tr>

When did they start filming star wars episode 9