Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Ralph Greenleaf (wanda aka haife shi a ranar 3 ga Nuwamba 1899 a Monmouth, Illinois, ya mutu a ranar 15 ga Maris 1950) ya kasance zakara na duniya na 20 na Pocket Billiard.
Tabbas, mafi mahimmancin jumlar ita ce "Ralph Greenleaf (an haife shi a ranar 3 ga Nuwamba 1899 a Monmouth, Illinois, ya mutu a ranar 15 ga Maris 1950) wani ɗan wasan pool ne na Amurka, mai cin Kofin Billiards na Duniya mai sau ashirin, wanda ƙwarewarsa da kwarjini suka mamaye wasan a lokacin da ya yi fice. "