@Work{OL880195W,
    title: {Essay concerning the true original extent and end of civil government},
    author: {John Locke},
    first_publish_year: {1691}
}

@Author{OL77200A,
    name: {John Locke},
    birth_date: {29 August 1632}
    , death_date: {28 October 1704}
}