We pick l.root-servers.net, one of the 13 root servers (1), and ask it about mebsis.meb.gov.tr and learn that tr is delegated to six name servers (2), so we ask tr.cctld.authdns.ripe.net where we learn that meb.gov.tr is delegated to one name server, including papatya.meb.gov.tr (3), so we ask that one and get the following answer: