Question:
Who was the chair of Economic Community of West African States in Feb, 1982?

Context:
 Sani Abacha is the chair of Economic Community of West African States from Jul, 1996 to Jun, 1998. 
 Ellen Johnson Sirleaf is the chair of Economic Community of West African States from Jun, 2016 to Jun, 2017. 
 Macky Sall is the chair of Economic Community of West African States from May, 2015 to Jun, 2016. 
 John Kufuor is the chair of Economic Community of West African States from Jan, 2003 to Jan, 2005. 
 Mathieu Kérékou is the chair of Economic Community of West African States from Jan, 1982 to Jan, 1983. 
 Nicéphore Soglo is the chair of Economic Community of West African States from Jan, 1993 to Jan, 1994. 
 John Mahama is the chair of Economic Community of West African States from Feb, 2013 to May, 2015. 
 Mamadou Tandja is the chair of Economic Community of West African States from Jan, 2005 to Jan, 2007. 
 Goodluck Jonathan is the chair of Economic Community of West African States from Feb, 2010 to Feb, 2012. 
 Yakubu Gowon is the chair of Economic Community of West African States from May, 1975 to Jul, 1975. 
 Abdulsalami Abubakar is the chair of Economic Community of West African States from Jun, 1998 to Jan, 1999. 
 Lansana Conté is the chair of Economic Community of West African States from Jan, 1984 to Jan, 1985. 
 Abdou Diouf is the chair of Economic Community of West African States from Jan, 1992 to Jan, 1993. 
 Étienne Gnassingbé Eyadéma is the chair of Economic Community of West African States from Jan, 1999 to Jan, 1999. 
 Ahmed Sékou Touré is the chair of Economic Community of West African States from Jan, 1983 to Jan, 1984. 
 Léopold Sédar Senghor is the chair of Economic Community of West African States from Sep, 1979 to Dec, 1980. 
 Mahamadou Issoufou is the chair of Economic Community of West African States from Jun, 2019 to Jun, 2020. 
 Abdoulaye Wade is the chair of Economic Community of West African States from Dec, 2001 to Jan, 2003. 
 Alpha Oumar Konaré is the chair of Economic Community of West African States from Jan, 1999 to Dec, 2001. 
 Muhammadu Buhari is the chair of Economic Community of West African States from Jul, 2018 to Jun, 2019. 
 Faure Essozimna Gnassingbé Eyadéma is the chair of Economic Community of West African States from Jun, 2017 to Jul, 2018. 
 Jerry Rawlings is the chair of Economic Community of West African States from Jan, 1994 to Jul, 1996. 
 Nana Akufo-Addo is the chair of Economic Community of West African States from Jun, 2020 to Dec, 2022. 
 Olusegun Obasanjo is the chair of Economic Community of West African States from Sep, 1977 to Sep, 1979. 
 Blaise Compaoré is the chair of Economic Community of West African States from Jan, 2007 to Dec, 2008. 
 Umaru Musa Yar'Adua is the chair of Economic Community of West African States from Dec, 2008 to Feb, 2010. 
 Siaka Probyn Stevens is the chair of Economic Community of West African States from Jan, 1981 to Jan, 1982. 
 Alassane Dramane Ouattara is the chair of Economic Community of West African States from Feb, 2012 to Feb, 2013.

Answer:
Mathieu Kérékou