text: from datetime import date, timedelta
  from models import NewsArticle
  
  def get_struct():
  	now = date.today()
  	fouryearsago = date.today() - timedelta(4*365, 0, 0)
  
  	# We intentionally don't put /about/newsarchive/ in the sitemap,
  	# since we don't care about getting it indexed.
  	# Also, don't bother indexing anything > 4 years old
  
  	for n in NewsArticle.objects.filter(approved=True, date__gt=fouryearsago):
  		yearsold = (now - n.date).days / 365
  		if yearsold > 4:
  			yearsold = 4
  		yield ('about/news/%s/' % n.id,
  			   0.5-(yearsold/10.0))
  