<Tr> <Th> Screenplay by </Th> <Td> <Ul> <Li> Betty Comden </Li> <Li> Adolph Green </Li> </Ul> </Td> </Tr> <Ul> <Li> Betty Comden </Li> <Li> Adolph Green </Li> </Ul> <Tr> <Th> Story by </Th> <Td> <Ul> <Li> Betty Comden </Li> <Li> Adolph Green </Li> </Ul> </Td> </Tr> <Ul> <Li> Betty Comden </Li> <Li> Adolph Green </Li> </Ul>

Who were the characters in singing in the rain