<Tr> <Td> Landmark Communications </Td> <Td> October 1, 2018 </Td> <Td> 964 </Td> <Td> ± 3.2% </Td> <Td> 48% </Td> <Td> 46% </Td> <Td> 6% </Td> </Tr> <Tr> <Td> Gravis Marketing </Td> <Td> July 27--29, 2018 </Td> <Td> 650 </Td> <Td> ± 3.8% </Td> <Td> 41% </Td> <Td> 43% </Td> <Td> 15% </Td> </Tr> <Table> General election results <Tr> <Th_colspan="2"> Party </Th> <Th> Candidate </Th> <Th> Votes </Th> <Th>% </Th> </Tr> <Tr> <Td> </Td> <Td> Democratic </Td> <Td> Sarah Riggs Amico </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Republican </Td> <Td> Geoff Duncan </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th_colspan="3"> Total votes </Th> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Party </Th> <Th> Candidate </Th> <Th> Votes </Th> <Th>% </Th> </Tr>

Who are the candidates running for lieutenant governor of georgia
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