Complex sentence: Thomas Crofton Croker, (January 15 1798--August 8 1854), was an Irish Antiquary, born at Cork, for some years held a position in the Admiralty.
Split into simpler sentences: Thomas Crofton Croker, (January 15 1798--August 8 1854), was an Irish antiquary, born at Cork. For some years held a position in the Admiralty.