"1693Z"^^ . "Harrison, John"@en . "Englishclockmaker,horologistand inventor of themarine chronometer" . "John Harrison (3 April [O.S. 24 March] 1693\u2013 24 March 1776) was a self-educated English carpenter and clockmaker. He invented the marine chronometer, a long-sought after device for solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long-distance sea travel in the Age of Sail."@en . . . . . "1776-03-24Z"^^ . "1776Z"^^ . "John Harrison"@en . . . . . . . "1693-03-24Z"^^ .