Question:
Who was the head coach of the team Legia Warsaw in Dec, 2016?

Context:
 Jerzy Engel is the head coach of Legia Warsaw from Jul, 1985 to Aug, 1987. 
 Krzysztof Etmanowicz is the head coach of Legia Warsaw from Aug, 1991 to Aug, 1992. 
 Karol Hanke is the head coach of Legia Warsaw from Mar, 1936 to Nov, 1936. 
 Stanisław Mielech is the head coach of Legia Warsaw from Jul, 1933 to Sep, 1933. 
 Edward Drabiński is the head coach of Legia Warsaw from Feb, 1948 to Sep, 1948. 
 Ricardo Sá Pinto is the head coach of Legia Warsaw from Aug, 2018 to Mar, 2019. 
 Janos Steiner is the head coach of Legia Warsaw from Feb, 1954 to Dec, 1955. 
 Edmund Zientara is the head coach of Legia Warsaw from Jul, 1969 to Jul, 1971. 
 Dean Klafurić is the head coach of Legia Warsaw from Apr, 2018 to Aug, 2018. 
 Wacław Kuchar is the head coach of Legia Warsaw from Jul, 1949 to Dec, 1953. 
 Józef Kałuża is the head coach of Legia Warsaw from May, 1930 to Jul, 1930. 
 Paweł Janas is the head coach of Legia Warsaw from Jan, 1994 to Jun, 1996. 
 Janusz Wójcik is the head coach of Legia Warsaw from Aug, 1992 to Jan, 1994. 
 Henning Berg is the head coach of Legia Warsaw from Dec, 2013 to Oct, 2015. 
 Dragan Okuka is the head coach of Legia Warsaw from Mar, 2001 to Jun, 2003. 
 Andrzej Strejlau is the head coach of Legia Warsaw from Dec, 1987 to Jun, 1989. 
 Ryszard Koncewicz is the head coach of Legia Warsaw from Jan, 1956 to Dec, 1958. 
 Jacek Magiera is the head coach of Legia Warsaw from Sep, 2016 to Sep, 2017. 
 Jacek Zieliński is the head coach of Legia Warsaw from Apr, 2007 to Jun, 2007. 
 Romeo Jozak is the head coach of Legia Warsaw from Sep, 2017 to Apr, 2018. 
 Dariusz Kubicki is the head coach of Legia Warsaw from Jun, 1999 to Sep, 1999. 
 Stjepan Bobek is the head coach of Legia Warsaw from Apr, 1959 to Dec, 1959. 
 Longin Janeczek is the head coach of Legia Warsaw from Jul, 1965 to Jun, 1966. 
 Aleksandar Vuković is the head coach of Legia Warsaw from Dec, 2021 to May, 2022. 
 Władysław Stachurski is the head coach of Legia Warsaw from Jul, 1996 to Jun, 1997. 
 Rudolf Kapera is the head coach of Legia Warsaw from Jul, 1989 to Apr, 1990. 
 Czesław Michniewicz is the head coach of Legia Warsaw from Sep, 2020 to Oct, 2021. 
 Kosta Runjaić is the head coach of Legia Warsaw from May, 2022 to Dec, 2022. 
 Krzysztof Gawara is the head coach of Legia Warsaw from Oct, 2004 to Dec, 2004. 
 Maciej Skorża is the head coach of Legia Warsaw from Jun, 2010 to May, 2012. 
 Jerzy Kopa is the head coach of Legia Warsaw from Apr, 1998 to Jan, 1999. 
 Jaroslav Vejvoda is the head coach of Legia Warsaw from Jul, 1973 to Jul, 1975. 
 Besnik Hasi is the head coach of Legia Warsaw from Jun, 2016 to Sep, 2016. 
 Lucjan Brychczy is the head coach of Legia Warsaw from Oct, 2004 to Dec, 2004. 
 Stanislav Cherchesov is the head coach of Legia Warsaw from Oct, 2015 to Jun, 2016. 
 Dariusz Wdowczyk is the head coach of Legia Warsaw from Sep, 2005 to Apr, 2007. 
 Stefan Białas is the head coach of Legia Warsaw from Mar, 2010 to May, 2010. 
 Jan Urban is the head coach of Legia Warsaw from Jun, 2007 to Mar, 2010. 
 Franciszek Smuda is the head coach of Legia Warsaw from Sep, 1999 to Mar, 2001. 
 Kazimierz Górski is the head coach of Legia Warsaw from Jul, 1981 to Dec, 1982.

Answer:
Jacek Magiera