get info from wikipedia

test.js

<script>    
    function dowiki(place) {
        var URL = 'https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=';

        URL += "&titles=" + place;
        URL += "&rvprop=content";
        URL += "&callback=?";
        $.getJSON(URL, function (data) {
            var obj = data.query.pages;
            var ob = Object.keys(obj)[0];
            console.log(obj[ob]["extract"]);
            try{
                document.getElementById('Label11').textContent = obj[ob]["extract"];
            }
            catch (err) {
                document.getElementById('Label11').textContent = err.message;
            }

        });
    }
</script>