<prompt> Pfupisa nyaya yacho: Muzvinabhizimisi weUnited States wezvivako Blackstone Group akati neMuvhuro kuti iri kutenga Willis Tower ine nhurikidzwa 110 muChicago, chivako chechipiri pakureba muUnited States. Blackstone haina kupa mutengo wokutenga kwacho kubva kuvane dzimba zvino, 233 South Wacker LLC, asi mishumo yakasiana-siana yenhau dzeU.S. yakaisa chibvumirano chacho pa 1.3billion. Yainzi Sears Tower, chivako chakareba mamita 1,451 ndicho chakanga chakareba kupfuura zvimwe zvose munyika kwechikamu chezana remakore pashure pokupedzwa kwacho muna 1973. Blackstone Group yakazivisa neMuvhuro kuti iri kutenga Sears Tower yeChicago pakati, inonzi inodhura 1.3billion. Skydeck yechivako iri pauriri hwechi103 inzvimbo inokwezva vashanyi inobvumira vanhu kutarira Chicago vachibva kumativi ose. Nhasi rinorongwa sechegumi, maererano neThe Skyscraper Center. Zita rechivako chakareba zvikurusa muUnited States rakaenda kuOne World Trade Center muNew York, yakapedzwa makore maviri apfuura. Zvidimbu zvegirazi zviri paSkydeck zvinotambanukira pamusoro pechivako chacho. Vanhu vanodarika miriyoni imwe nehafu vanoshanyira nzvimbo iyi inokwezva vashanyi gore negore. Skydeck yeWillis Tower, iri panhurikidzwa yechi103, inokwezva vashanyi vakawanda. Inopa vashanyi vane mamiriyoni 1,6 gore negore maonero eChicago nenzvimbo dzakapoteredza kusanganisira kubva kuLedge, magirazi egirazi anotambanuka kubva muchivako. Jacob Werner, maneja mukuru muboka rezvivakwa reBlackstone, akataura muchitaurwa neMuvhuro kuti Blackstone inoona zvine mukana mukuru mukuvandudza zvose zvivako zvekutengesa uye ruzivo rwevashanyi kune imwe yenzvimbo dzinozivikanwa zvikuru kune vashanyi kuChicago. Tinofara kuva tichitenga chivako ichi chine mukurumbira nokuda kwevashandi vedu vakaganhurirwa, Werner akawedzera kudaro. Tine tariro pamusoro peChicago sezvo makambani anowedzera mukati uye anotamira kuguta uye anotsvaka nzvimbo dzehofisi dzomuzana rokutanga. Basa rokuvaka shongwe yacho rakatanga muna 1970 uye rakapera muna 1973, maererano newebsite yepaIndaneti. Skydeck yakavhurwa zviri pamutemo kuvanhu vose muna 1974 uye yakagadziridzwa nemari inosvika mamiriyoni akawanda emadhora muna 2000. Shongwe yacho yaiva...  <response>: Blackstone Group yakati neMuvhuro iri kutenga chivako chine nhurikidzwa 110. Yaimbozivikanwa seSears Tower, chivako ichi ndicho chechigumi chakareba kupfuura zvimwe zvose munyika. Yakazotumidzwa zita rekuti Willis Tower muna 2009 mushure mekunge Willis North America, kambani yeinishuwarenzi iri muridzi weshongwe, yatenga kodzero dzekutumidza zita. Kutenga kunowedzera mamirioni 3.8 emamita akaenzana enzvimbo kuNew York-based Blackstones hombe portfolio yekudyara. 