with recursive extended_tags(s_subtagclassid,s_supertagclassid) as (
	select tc_tagclassid, tc_tagclassid from tagclass
	UNION
	select tc.tc_tagclassid, t.s_supertagclassid from tagclass tc, extended_tags t
		where tc.tc_subclassoftagclassid=t.s_subtagclassid
)
select p_personid, p_firstname, p_lastname, array_agg(distinct t_name), count(*)
from person, message p1, knows, message p2, message_tag, 
	(select distinct t_tagid, t_name from tag where (t_tagclassid in (
  		select distinct s_subtagclassid from extended_tags k, tagclass
		where tc_tagclassid = k.s_supertagclassid and tc_name = 'OfficeHolder') -- :tagClassName
   )) selected_tags
where
  k_person1id = 21990232556256 and 
  k_person2id = p_personid and 
  p_personid = p1.m_creatorid and 
  p1.m_c_replyof = p2.m_messageid and 
  p2.m_c_replyof is null and
  p2.m_messageid = mt_messageid and 
  mt_tagid = t_tagid
group by p_personid, p_firstname, p_lastname
order by 5 desc, 1
limit 20