using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
using System.IO;

namespace SimpleStreaming
{
  class Program
  {
    static void Main(string[] args)
    {
      XElement abstracts = XElement.Load(@"abstract.xml");
      IEnumerable<string> bardQuotes =
        from el in abstracts.Elements()
        where el.Element("abstract").Value
          .Contains("Shakespeare")
        select (string)el.Element("url");
      foreach (string str in bardQuotes)
      {
      Console.WriteLine(str);
      }
    }
  }
}