Question: What is the date of death of Wang Yuankui's father?

Knowledge 1: Wang Yuankui
Wang Yuankui (王元逵) (812–854), formally Duke Zhong of Taiyuan (太原忠公), was a general of the Chinese dynasty Tang Dynasty.Like his father Wang Tingcou, Wang Yuankui ruled Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei)in "de facto" independence from the imperial government, but unlike Wang Tingcou, he was respectful to the imperial government and often followed its orders. [SEP] Knowledge 2: Wang Tingcou
Wang Tingcou (王廷湊 or 王庭湊; died 834), formally the Duke of Taiyuan (太原公), was a general of the Chinese dynasty Tang Dynasty who, in 821, during the reign of Emperor Muzong, took over control of Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei) and thereafter ruled it in a "de facto" independent manner from the imperial government.He was said to be particularly cruel even for a warlord.After his death, his family held onto control of the circuit, even after the end of Tang Dynasty, until his great-great-grandson Wang Rong was overthrown in 921 – 100 years after Wang Tingcou had initially taken over the circuit.
Knowledge 1: Wang Yuankui
Wang Yuankui (王元逵) (812–854), formally Duke Zhong of Taiyuan (太原忠公), was a general of the Chinese dynasty Tang Dynasty.Like his father Wang Tingcou, Wang Yuankui ruled Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei)in "de facto" independence from the imperial government, but unlike Wang Tingcou, he was respectful to the imperial government and often followed its orders. [SEP] Knowledge 2: Etan Boritzer
Etan Boritzer( born 1950) is an American writer of children ’s literature who is best known for his book" What is God?" first published in 1989.His best selling" What is?" illustrated children's book series on character education and difficult subjects for children is a popular teaching guide for parents, teachers and child- life professionals.Boritzer gained national critical acclaim after" What is God?" was published in 1989 although the book has caused controversy from religious fundamentalists for its universalist views.The other current books in the" What is?" series includeWhat is Love?,What is Death?,What is Beautiful?,What is Funny?,What is Right?,What is Peace?,What is Money?,What is Dreaming?,What is a Friend?,What is True?,What is a Family?,What is a Feeling?"The series is now also translated into 15 languages.Boritzer was first published in 1963 at the age of 13 when he wrote an essay in his English class at Wade Junior High School in the Bronx, New York on the assassination of John F. Kennedy.His essay was included in a special anthology by New York City public school children compiled and published by the New York City Department of Education.Boritzer now lives in Venice, California and maintains his publishing office there also.He has helped numerous other authors to get published through" How to Get Your Book Published!" programs.Boritzer is also a yoga teacher who teaches regular classes locally and guest- teaches nationally.He is also recognized nationally as an erudite speaker on" The Teachings of the Buddha."
Knowledge 1: Wang Yuankui
Wang Yuankui (王元逵) (812–854), formally Duke Zhong of Taiyuan (太原忠公), was a general of the Chinese dynasty Tang Dynasty.Like his father Wang Tingcou, Wang Yuankui ruled Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei)in "de facto" independence from the imperial government, but unlike Wang Tingcou, he was respectful to the imperial government and often followed its orders. [SEP] Knowledge 2: Kong Xianrong
Kong Xianrong( 1881 － May 23, 1948), one of Wang Delin's companions who had been with him for many years as a bandit, was made one of Wang's company commanders along with Wu Yicheng, when Wang was taken into the Kirin Provincial army and became a battalion commander.When Wang Delin refused to submit to the Japanese during the invasion of Manchuria and formed the Chinese People's National Salvation Army.Kong became a commander within one of the largest and most successful of the Anti-Japanese Volunteer Armies.In September 1932 when the forces of Wang and Feng Zhanhai managed to briefly occupy the capital of Jilin province, Things began to go wrong when the NSA became embroiled in disputes with General Li Du's Jilin Self- Defence Army.One of Li Du's subordinates tried to persuade one of Wang Delin's commanders to transfer his force into the Li's Army.Also, NSA troops were killed by Li's Army for the confiscation of the weapons of a White Russian mine owner.Finally,Li's subordinate was put in a sack and thrown into a river, probably at the instigation Kong Xianrong, Wang Delin's deputy.This rift forced the abandonment of the city.After the Army of Wang Delin was defeated and retreated from Manchukuo, Kong Xianrong gave up the struggle, but his wife and another of Wang Delin's subordinates, Yao Zhenshan, led a small band which fought on until the spring of 1941 when it was annihilated.

Answer: 834