<Tr> <Th> Nations participating </Th> <Td> 167 </Td> </Tr> <Tr> <Th> Athletes participating </Th> <Td> 1517 </Td> </Tr> <Tr> <Th> Dates </Th> <Td> August 23--September 1 </Td> </Tr> <Tr> <Th> Main venue </Th> <Td> Olympic Stadium </Td> </Tr>

In the 1991 world track and field championships in tokyo