&& TweetSyntax.URL_PATTERN.matcher(tweetUser.getProfileImageUrl()).matches()) {
// Note: we can't easily delete an existing image (removing its
// rdf:type statement), as it might be the image of another
// agent. Therefore, "orphaned" Image resources are possible.
Image depiction = designate(tweetUser.getProfileImageUrl(), Image.class);
agent.setDepiction(depiction);
}
if (null != tweetUser.getFollowers()) {
Set<Agent> agents = new HashSet<Agent>();