public class Doc {
public String title;
public String author;
public String vabstract;
public String url;
public String url2;

public Doc () {
  title = "";
  author = "";
  vabstract = "";
  url="";
  url2="";
}

public void Doc (String ptitle, String pauthor, String pabstract, String purl,
                 String purl2) {
  title = ptitle;
  author = pauthor;
  vabstract = pabstract;
  url = purl;
  url2 = purl2;
}

public String toString () {
  String aux= "";

  aux = aux.concat("Title: " + this.title + "\n");
  aux = aux.concat("Authors: " + this.author + "\n");
  aux = aux.concat("Abstract: " + this.vabstract + "\n");
  aux = aux.concat("URL: " + this.url + "\n");
  aux = aux.concat("Transcript URL: " + this.url2 + "\n");
  return aux;
}

}