Question: When was the Kenyan long- and middle-distance runner which Wes Kittley made a national champion born? 

Context articles: Hicham El Guerrouj
Wes Kittley
Pamela Jelimo
John Gregorek
Wilson Kiprugut
Stepan Poistogov
Kevin Chelimo
Mehdi Baala
Kennedy Kithuka
Sally Kipyego

Hicham El Guerrouj (Moroccan Arabic: هشام الݣروج , Berber: Hicam El Gerruj, ⵀⵉⵛⴰⵎ ⴻⵍ ⴳⴻⵔⵔⵓⵊ; born 14 September 1974) is a retired Moroccan middle-distance runner.
 El Guerrouj is the current world record holder in the 1500 meters, mile and outdoor 2000 meters events and a two-time Olympic gold medalist.
 He is considered the greatest middle-distance runner of all time.
Wes Kittley (born in Rule, Texas) is the current head coach of the Texas Tech Red Raiders men's and women's track and field teams.
 He has produced several national champions and Olympians in Sally Kipyego and Kennedy Kithuka.
Pamela Jelimo (born 5 December 1989) is a Kenyan middle-distance runner, specialising in the 800 metres.
 She won the gold medal in this event at the 2008 Olympics in Beijing at the age of 18.
 She is the first Kenyan woman to win an Olympic gold medal and also the first Kenyan to win the Golden League Jackpot.
 She holds both the 800 m world junior record and the senior African record over the same distance.
 Jelimo is also one of the youngest women to win an Olympic gold medal for Kenya.
John Gregorek (born 15 April 1960) is an American former middle-distance runner who competed in the Summer Olympics in 1980 (boycotted) and 1984.
 His son, John Gregorek Jr., is also a competitive middle-distance runner, who competed in the 2017 World Championships.
Wilson Chuma Kiprugut (born 1938) is a retired Kenyan sprinter and middle-distance runner.
 He competed at the 1964 and 1968 Olympics and won two medals in the 800 metres event; in 1964 he also ran 400 metres, but failed to reach the final.
 He was the first Kenyan athlete to win an Olympic medal.
Stepan Poistogov (born 14 December 1986) is a Russian middle-distance runner.
 He competed in the 800 metre event at the 2014 IAAF World Indoor Championships.
 He is married to fellow middle-distance runner Ekaterina Poistogova.
Kevin Chelimo (born 14 February 1983) is a Kenyan long- and middle-distance runner.
Mehdi Baala (Arabic: مهدي بعلة‎ ‎ ; born 17 August 1978 in Strasbourg) is a French, middle-distance runner competing mainly in the 1500 metres event.
 Baala has won several major international championships medals in the 1500 metres event – an Olympic Games bronze, a World Championships silver, two European Championships golds and a European Indoor Championships bronze.
 Moreover, he has won several medals in the 1500 metres event of the European Cup, IAAF World Cup and the IAAF World Athletics Final.
 Baala is considered to be the best French middle-distance runner of all time.
 As of July 2013, he holds French national outdoor records for four distances (800m: 1.43.15, 1000m: 2.13.96, 1500m: 3.28.98 and 2000m: 4.53.12; all of these were set from 2002 to 2005) and French national indoor records for four distances (800m, 1000m, 1500m and the mile; all of these were set from 2003 to 2009).
Kennedy Kithuka (born June 4, 1989 in Thika, Kenya) is a Kenyan cross country runner and Track for Texas Tech under head coach Wes Kittley.
Sally Jepkosgei Kipyego (born 19 December 1985) is a Kenyan long- and middle-distance runner.
 She was the silver medallist in the 10,000 metres at the 2011 World Championships in Athletics and the silver medalist in the same race at the 2012 Summer Olympic Games in London.
 She has a personal record of 30:38.35 minutes for that event and her 5000 metres best of 14:30.42 minutes makes her the second fastest Kenyan woman for the distance.