<Tr> <Td> Thompson, Benjamin Benjamin Thompson </Td> <Td> Whig </Td> <Td> </Td> <Td> 000000001845 - 03 - 04 - 0000 March 4, 1845--March 3, 1847 </Td> <Td> First elected in 1844 . Retired . </Td> </Tr> <Tr> <Td> 000000001851 - 03 - 04 - 0000 March 4, 1851--September 24, 1852 </Td> <Td> Again elected in 1850 . Died . </Td> </Tr> <Tr> <Td> Thompson, Charles P. Charles P. Thompson </Td> <Td> Democratic </Td> <Td> 6 </Td> <Td> 000000001875 - 03 - 04 - 0000 March 4, 1875--March 7, 1877 </Td> <Td> Elected in 1874 . Lost re-election to George B. Loring . </Td> </Tr> <Tr> <Td> Tierney, John F. John F. Tierney </Td> <Td> Democratic </Td> <Td> 6 </Td> <Td> 000000001997 - 01 - 03 - 0000 January 3, 1997--January 3, 2015 </Td> <Td> First elected in 1996 . Lost renomination to Seth Moulton . </Td> </Tr>

How many representatives does ma have in the us house