text: 
  select count(distinct q1.id) from
  site, post_link pl, question q1, question q2, comment c1, comment c2,
  tag, tag_question tq1, tag_question tq2
  where
  site.site_name = 'german' and
  pl.site_id = site.site_id and
  
  pl.site_id = q1.site_id and
  pl.post_id_from = q1.id and
  pl.site_id = q2.site_id and
  pl.post_id_to = q2.id and
  
  c1.site_id = q1.site_id and
  c1.post_id = q1.id and
  
  c2.site_id = q2.site_id and
  c2.post_id = q2.id and
  
  c1.date > c2.date and
  
  tag.name in ('json', 'node.js', 'asp.net') and
  tag.id = tq1.tag_id and
  tag.site_id = tq1.site_id and
  tag.id = tq2.tag_id and
  tag.site_id = tq1.site_id and
  
  tag.site_id = pl.site_id and
  
  tq1.site_id = q1.site_id and
  tq1.question_id = q1.id and
  tq2.site_id = q2.site_id and
  tq2.question_id = q2.id;
  
  