<Tr> <Th> Varsity teams </Th> <Td> 23 </Td> </Tr> <Tr> <Th> Football stadium </Th> <Td> Notre Dame Stadium </Td> </Tr> <Tr> <Th> Basketball arena </Th> <Td> Edmund P. Joyce Center </Td> </Tr> <Tr> <Th> Baseball stadium </Th> <Td> Frank Eck Stadium </Td> </Tr>

How did the notre dame fighting irish get their name