Question:
Who was the chair of National Bank of Ukraine in Jun, 1991?

Context:
 Ihor Sorkin is the chair of National Bank of Ukraine from Jan, 2013 to Feb, 2014. 
 Viktor Yushchenko is the chair of National Bank of Ukraine from Jan, 1993 to Jan, 2000. 
 Serhiy Tihipko is the chair of National Bank of Ukraine from Dec, 2002 to Dec, 2004. 
 Serhiy Arbuzov is the chair of National Bank of Ukraine from Dec, 2010 to Jan, 2013. 
 Yakiv Smolii is the chair of National Bank of Ukraine from Mar, 2018 to Dec, 2022. 
 Vadym Hetman is the chair of National Bank of Ukraine from Mar, 1992 to Dec, 1992. 
 Volodymyr Stelmakh is the chair of National Bank of Ukraine from Dec, 2004 to Dec, 2010. 
 V. P. Matvienko is the chair of National Bank of Ukraine from Jun, 1991 to Mar, 1992. 
 Stepan Kubiv is the chair of National Bank of Ukraine from Jun, 2014 to Mar, 2018.

Answer:
Question:
Who was the chair of National Bank of Ukraine in Jun, 1991?

Context:
 Ihor Sorkin is the chair of National Bank of Ukraine from Jan, 2013 to Feb, 2014. 
 Viktor Yushchenko is the chair of National Bank of Ukraine from Jan, 1993 to Jan, 2000. 
 Serhiy Tihipko is the chair of National Bank of Ukraine from Dec, 2002 to Dec, 2004. 
 Serhiy Arbuzov is the chair of National Bank of Ukraine from Dec, 2010 to Jan, 2013. 
 Yakiv Smolii is the chair of National Bank of Ukraine from Mar, 2018 to Dec, 2022. 
 Vadym Hetman is the chair of National Bank of Ukraine from Mar, 1992 to Dec, 1992. 
 Volodymyr Stelmakh is the chair of National Bank of Ukraine from Dec, 2004 to Dec, 2010. 
 V. P. Matvienko is the chair of National Bank of Ukraine from Jun, 1991 to Mar, 1992. 
 Stepan Kubiv is the chair of National Bank of Ukraine from Jun, 2014 to Mar, 2018.

Answer:
user
V. P. Matvienko
assistant
Question:
Who was the chair of National Bank of Ukraine in Jun, 1991?

Context:
 Ihor Sorkin is the chair of National Bank of Ukraine from Jan, 2013 to Feb, 2014. 
 Viktor Yushchenko is the chair of National Bank of Ukraine from Jan, 1993 to Jan, 2000. 
 Serhiy Tihipko is the chair of National Bank of Ukraine from Dec, 2002 to Dec, 2004. 
 Serhiy Arbuzov is the chair of National Bank of Ukraine from Dec, 2010 to Jan, 2013. 
 Yakiv Smolii is the chair of National Bank of Ukraine from Mar, 2018 to Dec, 2022. 
 Vadym Hetman is the chair of National Bank of Ukraine from Mar, 1992 to Dec, 1992. 
 Volodymyr Stelmakh is the chair of National Bank of Ukraine from Dec, 2004 to Dec, 2010. 
 V. P. Matvienko is the chair of National Bank of Ukraine from Jun, 1991 to Mar, 1992. 
 Stepan Kubiv is the chair of National Bank of Ukraine from Jun, 2014 to Mar, 2018.

Answer:
user
Stepan Kubiv
Serhiy Tihipko
Volodymyr Stelmakh
Viktor Yushchenko
Serhiy Arbuzov
Yakiv Smolii
Vadym Hetman
Ihor Sorkin
assistant
Question:
Who was the chair of National Bank of Ukraine in Jun, 1991?

Context:
 Ihor Sorkin is the chair of National Bank of Ukraine from Jan, 2013 to Feb, 2014. 
 Viktor Yushchenko is the chair of National Bank of Ukraine from Jan, 1993 to Jan, 2000. 
 Serhiy Tihipko is the chair of National Bank of Ukraine from Dec, 2002 to Dec, 2004. 
 Serhiy Arbuzov is the chair of National Bank of Ukraine from Dec, 2010 to Jan, 2013. 
 Yakiv Smolii is the chair of National Bank of Ukraine from Mar, 2018 to Dec, 2022. 
 Vadym Hetman is the chair of National Bank of Ukraine from Mar, 1992 to Dec, 1992. 
 Volodymyr Stelmakh is the chair of National Bank of Ukraine from Dec, 2004 to Dec, 2010. 
 V. P. Matvienko is the chair of National Bank of Ukraine from Jun, 1991 to Mar, 1992. 
 Stepan Kubiv is the chair of National Bank of Ukraine from Jun, 2014 to Mar, 2018.

Answer:
user
V. P. Matvienko
assistant