Assembly Square is a neighbourhood and its consensus geometry is derived from mz.
{"qs:localhoods":16,"geom:latitude":42.392833,"wof:name":"Assembly Square","counts:names_total":3,"wd:wordcount":2328,"mz:is_current":0,"qs:gn_nam_loc":"Somerville, Middlesex, Massachusetts, US","wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102084643,"localadmin_id":404476445,"locality_id":85950339,"neighbourhood_id":85881039,"region_id":85688645}],"wof:geom_alt":["quattroshapes_pg","zetashapes","quattroshapes"],"mz:min_zoom":14,"lbl:latitude":42.392833,"qs:gn_adm0_cc":"US","geom:area":0,"mz:is_funky":0,"mz:is_official":0,"qs:name":"Mystic River","qs:woe_adm2":12588708,"counts:concordances_total":4,"qs:woe_adm1":2347580,"edtf:deprecated":"2016-09-21","geom:type":"Point","qs:woe_adm0":23424977,"wof:lastmodified":1582336741,"qs:photo_sum":331,"wof:belongsto":[102191575,404476445,85633793,85950339,102084643,85688645],"mps:latitude":42.391734,"wof:repo":"whosonfirst-data-admin-us","wof:lang":["eng"],"mz:tier_metro":1,"wof:country":"US","counts:names_preferred":1,"geom:area_square_m":70464.420812,"counts:names_variant":2,"wof:breaches":[],"edtf:inception":"uuuu","qs:woe_local":2495739,"iso:country":"US","qs:gn_fcode":"PPL","geom:bbox":"-71.077991,42.392833,-71.077991,42.392833","name:eng_x_preferred":["Mystic River"],"src:lbl:centroid":"mz","wof:superseded_by":[],"qs:photo_max":45,"wof:geomhash":"2d78e0f4ee5e94b0272c21424f611bef","zs:pop10":0,"wof:placetype_id":102312319,"qs:local_max":8565,"qs:woe_ver":"7.10.0","mz:is_ceased":0,"qs:placetype":"Suburb","name:unk_x_variant":["Mystic River"],"qs:quad_count":24,"wof:placetype":"neighbourhood","mz:max_zoom":18,"qs:woe_lau":0,"gn:id":"","qs:gn_local":4951257,"mz:is_deprecated":1,"zs:housing10":0,"mz:tier_locality":3,"wd:latitude":42.3917,"geom:longitude":-71.077991,"wof:id":85881039,"qs:local_sum":32967,"qs:name_local":"Somerville","qs:name_adm2":"Middlesex","wof:concordances":{"gp:id":55861929,"qs:id":383002,"qs_pg:id":383002,"wd:id":"Q4808671"},"name:eng_x_variant":["Mystic Riv"],"src:geom":"mz","src:geom_alt":["quattroshapes","quattroshapes_pg","zetashapes"],"qs:name_adm0":"United States","qs:name_adm1":"Massachusetts","wof:tags":[],"zs:blockids":[250250406001000,250250406001001,250250406001002],"counts:names_languages":2,"mz:is_hard_boundary":0,"mps:longitude":-71.070096,"qs:gn_namadm1":"MA","qs:gn_name":"Mystic Grove","wof:supersedes":[],"lbl:longitude":-71.077991,"mz:is_landuse_aoi":0,"wof:parent_id":85950339,"wof:placetype_names":["neighbourhood"],"mz:hierarchy_label":0,"edtf:cessation":"uuuu","wd:longitude":-71.0785}