Ƙirƙirar wani nau'i mai rikitarwa na wannan jumla Zahn ya fara ganewa a ƙarshen shekarun 1990.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Zahn an fara bincikar shi ne a ƙarshen shekarun 1990, kuma bayan haka, ya zama mai goyon bayan murya na yankin Relay for Life da American Cancer Society. "