Retrieve data from website by httlpAgilityPack?

string url = "http://dictionary.cambridge.org/dictionary/british/appeal";
        HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
        WebRequest request = WebRequest.Create(url);
        WebResponse response = await request.GetResponseAsync();
        StreamReader stream = new StreamReader(response.GetResponseStream());
        string content = await stream.ReadToEndAsync();

        List<string> list = new List<string>();
        ...
        foreach (...)
        {
           ...
        }

<span class="sense-body">

    <span class="def-block">
        <span class="def-head">
            <span class="def-info"></span>
            <span class="def">

                a 

                <a class="query" title="request" href="http://dictionary.cambridge.org/dictionary/british/request"></a>

                 to the 

                <a class="query" title="public" href="http://dictionary.cambridge.org/dictionary/british/public"></a>

                 for 

                <a class="query" title="money" href="http://dictionary.cambridge.org/dictionary/british/money"></a>

                , 

                <a class="query" title="information" href="http://dictionary.cambridge.org/dictionary/british/information"></a>

                , or 

                <a class="query" title="help" href="http://dictionary.cambridge.org/dictionary/british/help"></a>

                : 

            </span>
        </span>
        <span class="def-body"></span>
    </spa