{
    "query": {
        "category": "Environment",
        "publication_date": "1991-01",
        "nr_of_items": 1
    },
    "items": [
        {
            "title": "World Population Growth and Aging",
            "subtitle": "Demographic Trends in the Late Twentieth Century",
            "author": "Keyfitz, Nathan",
            "isbn": "9780226432373",
            "publisher": "University of Chicago Press",
            "link_to_publisher": "https:\/\/press.uchicago.edu\/ucp\/books\/book\/chicago\/W\/bo3616520.html"
        }
    ]
}