{"Status":2,"TC":false,"RD":true,"RA":true,"AD":false,"CD":false,"Question":[{"name":"csse.szu.edu.cn.","type":1}],"Comment":"DNSSEC validation failure. Could not get DNSKEY or DS records needed for validation. Check http://dnsviz.net/d/csse.szu.edu.cn/dnssec/ and http://dnssec-debugger.verisignlabs.com/csse.szu.edu.cn for errors","extended_dns_errors":[{"info_code":22,"extra_text":"At delegation szu.edu.cn for szu.edu.cn/dnskey"}]}