<Tr> <Th> Year </Th> <Th> Category </Th> <Th> Film </Th> </Tr> <Tr> <Td> </Td> <Td> Best Actor </Td> <Td> Agneepath </Td> </Tr> <Tr> <Td> 2005 </Td> <Td> Black </Td> </Tr> <Tr> <Td> 2009 </Td> <Td> Paa </Td> </Tr>

For which film did amitabh bachchan win his first filmfare award for best actor