There is never one unique solution to this kind of problem. Here is an XPATH that seems to do some kind of it though:

        HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
        doc.Load(yourHtmlFile);

        doc.Save(Console.Out);

        foreach (HtmlNode node in doc.DocumentNode.SelectNodes("//tr[td/strong/text() = 'Contact']/following-sibling::tr/td/text()[. != ' ']"))
        {
            Console.WriteLine(node.OuterHtml);
        }

will display this:

John Doe
Jane Doe
32
1998