anchor.diff:  					</c:forEach>
   				</ul><br />
   				by
  -				 <ul>
  +				 <ul itemprop="byArtist" itemscope itemtype="http://www.schema.org/MusicGroup">
   					<c:forEach var="artist" items="${record.artist}">
  -						<li>${artist.name}</li>
  +						<li itemprop="name">${artist.name}</li>
   					</c:forEach>
   				</ul>
   				
  
positive.code: <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
  <%@ page session="false" %>
  <!DOCTYPE html>
  
negative.code: 				<th>Artist</th>
  			</tr>
  			<c:forEach var="track" items="${record.tracks}">
  				<tr itemprop="tracks" itemscope itemtype="http://www.schema.org/MusicRecording">
  					<td>${track.trackNr}</td>
  					<td itemprop="name">${track.name}</td>
  					<td itemprop="duration">${track.length}</td>
  					<td>
  						<c:if test="${! empty track.artist}">
  							<a href="artist?q=${track.artist}" itemprop="byArtist">${track.artist}</a>
  						</c:if>
  						<c:if test="${empty track.artist}">
  							<c:forEach var="artist" items="${record.artist}">
  								<a href="artist?q=${artist.name}" itemprop="byArtist">${artist.name}</a> 
  							</c:forEach>
  						</c:if>
  					</td>
  