question: Who is older, Burkhard Jung or Christopher Polge?
context: [["Chris Bell", ["Chris or Christopher Bell may refer to:"]], ["Burkhard Jung", ["Burkhard Jung( born 7 March 1958 in Siegen) is a German politician, representative of the Social Democratic Party.", "Since March 29, 2006, he has been the 21st lord mayor(\" Oberb\u00fcrgermeister\") of Leipzig( Saxony)."]], ["Chris Stewart", ["Chris or Christopher Stewart may refer to:"]], ["Kim Gi-jung", ["Kim Gi-jung or Kim Ki-jung( or; born 14 August 1990) is a male South Korean badminton player.", "He competed at the Rio 2016 Summer Olympics in themen's doubles event."]], ["Kim Gi-jung", ["Kim Gi-jung or Kim Ki-jung( or; born 14 August 1990) is a male South Korean badminton player.", "He competed at the Rio 2016 Summer Olympics in themen's doubles event."]], ["Chris Wilson", ["Chris or Christopher Wilson may refer to:"]], ["Christopher Robinson", ["Chris or Christopher Robinson may refer to:"]], ["Chris King", ["Chris or Christopher King may refer to:"]], ["Kim Hyun-jung", ["Kim Hyun- Jung or Kim Hyeon- Jung or Kim Hyeon- jeong is a transliteration of one Korean name.", "It may refer to:"]], ["Christopher Polge", ["Ernest John Christopher Polge( 16 August 1926 \u2013 17 August 2006) was an English biologist, most noted for his work in cryopreservation.", "The son of a Buckinghamshire farmer, he was educated at Bootham School in York, before going to the University of Reading where he studied Agriculture, graduating with an Ordinary degree.", "He worked briefly as an agricultural economist before joining the Division of Experimental Biology at the National Institute for Medical Research at Mill Hill, London, and later the Animal Research Station at Cambridge, where he worked under Sir John Hammond", "It was while a doctoral student that he solved the long- standing problem of how to preserve living cells and tissues at very low temperatures.", "In 1950, Polge produced the first chicks from eggs fertilised with frozen sperm, the first vertebrates to be produced in this way.", "Two years later, Polge reported high pregnancy rates in cattle using sperm that had been frozen for periods in excess of a year, work which had far- reaching consequences for the future of artificial insemination and genetic improvement in livestock.", "After the Animal Research Station closed in 1986, Polge co-founded Animal Biotechnology Cambridge Ltd., where he was also Scientific Director, to translate basic and applied research into commercial agricultural processes and products.", "He was also a Fellow of Wolfson College from 1984 to 1993( Emeritus Fellow after)", "Polge was elected to the Royal Society in 1983, won the 1988 Wolf Foundation Prize in Agriculture, and was made a Commander of the Order of the British Empire in 1992.", "He was elected to the US National Academy of Sciences as a foreign associate in 1997."]]]
supporting_facts: [["Burkhard Jung", 0], ["Christopher Polge", 0]]
evidences: [["Burkhard Jung", "date of birth", "7 March 1958"], ["Christopher Polge", "date of birth", "16 August 1926"]]
answer: Christopher Polge