Question: What state did Qiudong Wang recieve his Ph.D in?

Context paragraphs:
Qiudong Wang: Qiudong Wang is a Professor at the Department of Mathematics, the University of Arizona.  In 1982 he received a B.S. at Nanjing University and in 1994 a Ph.D. at the University of Cincinnati.

Zhao (Five Dynasties period): Zhao (趙, ~910–~921) was a state early in the Five Dynasties period of the history of China in what is now central Hebei.  The ancestors of Zhao's only prince, Wang Rong, had long governed the region as military governors ("Jiedushi") of the Tang dynasty's Chengde Circuit (, headquartered in modern Shijiazhuang, Hebei), and after the collapse of the Tang in 907, the succeeding Later Liang's founding emperor ("Taizu"), Zhu Wen made Wang, then his vassal, the Prince of Zhao.  In 910, when the Emperor tried to directly take over the territory of Zhao and its neighboring Yiwu Circuit (, headquartered in modern Baoding, Hebei), Wang Rong and Yiwu's military governor Wang Chuzhi turned against the Later Liang, aligning themselves with Later Liang's archenemy, Jin's prince, Li Cunxu, instead.  In 921, Wang Rong's soldiers assassinated him, slaughtered the Wang clan, and supported his adoptive son Zhang Wenli (known as Wang Deming while under Wang Rong's adoption) to succeed him instead.  Li Cunxu soon defeated Zhang Wenli's son and successor Zhang Chujin and incorporated Zhao into Jin territory.

Wang Yanbing: Wang Yanbing (王延稟) (d. 931), né Zhou Yanchen (周彥琛), formally Prince Weisu of Wuping (武平威肅王), was an adoptive son of Wang Shenzhi (commonly considered the founding ruler of the Chinese Five Dynasties and Ten Kingdoms Period state Min).  After Wang Shenzhi's death and succession by Wang Shenzhi's biological son Wang Yanhan, Wang Yanbing, jointly with another biological son of Wang Shenzhi's, Wang Yanjun, overthrew Wang Yanhan to allow Wang Yanjun to rule Min.  However, he later developed a rivalry with Wang Yanjun and tried to overthrow Wang Yanjun.  His army was defeated by Wang Yanjun's, and he was captured and executed.

Wang Dan (dissident): Wang Dan (born February 26, 1969) is a leader of the Chinese democracy movement, was one of the most visible of the student leaders in the Tiananmen Square protests of 1989.  Wang holds a Ph.D. in history from Harvard University.  From August 2009 to February 2010, Wang taught cross-strait history at Taiwan's National Chengchi University, as a visiting scholar.  He later taught at National Tsing Hua University.  Besides conducting research on related topics, Wang is still active in promoting democracy and freedom for China.  He travels the world to garner support from overseas Chinese communities as well as from the general public at large.

Empress Dowager Xu: Empress Dowager Xu (徐太后, personal name unknown) (died 926), honored as Empress Dowager Shunsheng (順聖太后) during the reign of her son Wang Yan (né Wang Zongyan), known as Consort Xu with the imperial consort rank "Xianfei" (徐賢妃) during the reign of her husband Wang Jian, was an empress dowager of the Chinese Five Dynasties and Ten Kingdoms period state Former Shu.  She was one of the favorite concubines of Wang Jian, the founder of Former Shu, and through her palace machinations was able to have her son Wang Yan (who was then named Wang Zongyan) made Wang Jian's heir.  She was described as beautiful and capable of writing poems, but corrupt.  After Former Shu's destruction by Later Tang, she, her son, as well as the rest of the Former Shu imperial family, were executed by Emperor Zhuangzong of Later Tang.

Tang Daoxi: Tang Daoxi (唐道襲) (died August 21, 913) was an official and general of the Chinese Five Dynasties and Ten Kingdoms period state Former Shu.  He was a close associate of Former Shu's founding emperor Wang Jian and held great power during Wang Jian's reign.  This brought him into conflict with Wang Jian's son and crown prince Wang Yuanying.  In 913, with both he and Wang Yuanying suspecting the other of being ready to launch a mutiny, their forces engaged in a battle at the Former Shu capital Chengdu.  He was defeated by Wang Yuanying and killed in battle.

Wang Yu (lawyer): Wang Yu (born 1 May 1971) is a prominent Chinese human rights lawyer.  She was arrested by Chinese authorities in 2015 when China initiated a crackdown against human rights attorneys, not unlike a 2011 crackdown in China, only four years earlier.  Ms. Wang was charged with inciting subversion of state power which is a serious offense in China carrying a life sentence.  Wang is a lawyer with the Fengrui law firm in Beijing.  That law firm has been targeted by the government in its crackdown, which arrested two lawyers and one intern there in addition to Wang and her husband, Bao Longjun.  Late in 2016, Chinese authorities released Wang Yu on bail after she was in all likelihood coerced to give a televised confession in which she denounced her colleagues and suggested that her human rights work was the result of foreign activists out to smear China.  “I won’t be used by them anymore,” Ms. Wang said in a video published on a Communist Party news site.  Her confession followed a pattern similar to those given to Chinese authorities by other lawyers, publishers and human rights activists.  Friends said that although released from detention, Ms. Wang would still remain under surveillance by Chinese authorities for years and would not be free to come and go as she pleases.

Wang Jingren: Wang Jingren (王景仁), né Wang Maozhang (王茂章, name changed 906?) , was a major general during the Chinese Five Dynasties and Ten Kingdoms period state Later Liang.  He was originally a general under Yang Xingmi the Prince of Wu in the late Tang Dynasty, but later got into a dispute with Yang's son and successor Yang Wo and forced to flee to the domain of Qian Liu, who, as a Later Liang vassal, later sent Wang to Later Liang, whose Emperor Taizu (Zhu Quanzhong) was impressed with Wang's abilities and therefore made Wang a major general.  Wang, however, was not successful in subsequent campaigns against either Wu or Later Liang's northern enemy Jin.

Zhang Wenli: Zhang Wenli (張文禮) (d. September 15, 921?) , known as Wang Deming (王德明) during the time that he was an adoptive son of Wang Rong, was an army officer who initially served under the late Tang Dynasty warlord Liu Rengong and Liu Rengong's son Liu Shouwen, and later Wang Rong, the only prince of the early Five Dynasties and Ten Kingdoms period state Zhao (also known as Chengde Circuit (成德)).  Wang Rong favored him for his talent and adopted him as a son.  However, in 921, he encouraged Wang Rong's guards to mutiny and slaughter the Wang clan.  He then took over the Zhao lands.  When Wang Rong's ally Li Cunxu the Prince of Jin attacked in response, he died in shock.

University of Cincinnati: The University of Cincinnati (commonly referred to as UC or Cincinnati) is a comprehensive public research university in Cincinnati, in the U.S. state of Ohio, and a part of the University System of Ohio.

Supporting paragraphs: Qiudong Wang University of Cincinnati
Answer: Ohio