9978 is a postalcode and its consensus geometry is derived from oa.
{"mz:is_ceased":0,"geom:latitude":53.386892,"wof:name":"9978","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":-1,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633337,"localadmin_id":404474575,"locality_id":1158796571,"postalcode_id":538958683,"region_id":85687059}],"mz:is_deprecated":0,"geom:area":9.63E-4,"geom:longitude":6.3396,"wof:id":538958683,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1513380983,"clustr:alpha":1,"wof:belongsto":[85687059,102191581,404474575,85633337,1158796571],"mz:is_clustr":1,"wof:concordances":{"gp:id":"12853871"},"wof:repo":"whosonfirst-data-postalcode-nl","src:geom":"oa","wof:country":"NL","counts:names_preferred":0,"gp:parent_id":"12592112","geom:area_square_m":7102388.391332,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"NL","counts:names_languages":0,"geom:bbox":"6.30650663376,53.3759803772,6.37262487411,53.3960647583","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"4bf3ee5d477fd6fceebef3a1a23db5ea","wof:parent_id":1158796571,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}