<Tr> <Td> Böblingen Sportshalle </Td> <Td> 1972 Munich </Td> <Td> Handball </Td> <Td> Not listed </Td> <Td> </Td> </Tr> <Tr> <Td> Bogenschießlage </Td> <Td> 1972 Munich </Td> <Td> Archery </Td> <Td> 1,100 </Td> <Td> </Td> </Tr> <Tr> <Td> Bois de Boulogne </Td> <Td> 1900 Paris </Td> <Td> Croquet, polo, tug of war </Td> <Td> Not listed . </Td> <Td> </Td> </Tr> <Tr> <Td> Bois de Vincennes </Td> <Td> 1900 Paris </Td> <Td> Archery </Td> <Td> Not listed . </Td> <Td> </Td> </Tr>

How many summer olympic events start with b