Question:
Who was the head of Ukraine in May, 2018?

Context:
 Mykola Azarov is the head of the government of Ukraine from Mar, 2010 to Jan, 2014. 
 Pavlo Lazarenko is the head of the government of Ukraine from May, 1996 to Jun, 1997. 
 Arseniy Yatsenyuk is the head of the government of Ukraine from Feb, 2014 to Apr, 2016. 
 Oleksiy Honcharuk is the head of the government of Ukraine from Aug, 2019 to Mar, 2020. 
 Viktor Yanukovych is the head of the government of Ukraine from Nov, 2007 to Dec, 2007. 
 Volodymyr Groysman is the head of the government of Ukraine from Apr, 2016 to Aug, 2019. 
 Denys Shmyhal is the head of the government of Ukraine from Mar, 2020 to Dec, 2022. 
 Yulia Tymoshenko is the head of the government of Ukraine from Mar, 2010 to Mar, 2010. 
 Serhiy Arbuzov is the head of the government of Ukraine from Jan, 2014 to Feb, 2014. 
 Yuriy Yekhanurov is the head of the government of Ukraine from May, 2006 to Aug, 2006.

Answer:
Question:
Who was the head of Ukraine in May, 2018?

Context:
 Mykola Azarov is the head of the government of Ukraine from Mar, 2010 to Jan, 2014. 
 Pavlo Lazarenko is the head of the government of Ukraine from May, 1996 to Jun, 1997. 
 Arseniy Yatsenyuk is the head of the government of Ukraine from Feb, 2014 to Apr, 2016. 
 Oleksiy Honcharuk is the head of the government of Ukraine from Aug, 2019 to Mar, 2020. 
 Viktor Yanukovych is the head of the government of Ukraine from Nov, 2007 to Dec, 2007. 
 Volodymyr Groysman is the head of the government of Ukraine from Apr, 2016 to Aug, 2019. 
 Denys Shmyhal is the head of the government of Ukraine from Mar, 2020 to Dec, 2022. 
 Yulia Tymoshenko is the head of the government of Ukraine from Mar, 2010 to Mar, 2010. 
 Serhiy Arbuzov is the head of the government of Ukraine from Jan, 2014 to Feb, 2014. 
 Yuriy Yekhanurov is the head of the government of Ukraine from May, 2006 to Aug, 2006.

Answer:
user
Volodymyr Groysman
assistant
Question:
Who was the head of Ukraine in May, 2018?

Context:
 Mykola Azarov is the head of the government of Ukraine from Mar, 2010 to Jan, 2014. 
 Pavlo Lazarenko is the head of the government of Ukraine from May, 1996 to Jun, 1997. 
 Arseniy Yatsenyuk is the head of the government of Ukraine from Feb, 2014 to Apr, 2016. 
 Oleksiy Honcharuk is the head of the government of Ukraine from Aug, 2019 to Mar, 2020. 
 Viktor Yanukovych is the head of the government of Ukraine from Nov, 2007 to Dec, 2007. 
 Volodymyr Groysman is the head of the government of Ukraine from Apr, 2016 to Aug, 2019. 
 Denys Shmyhal is the head of the government of Ukraine from Mar, 2020 to Dec, 2022. 
 Yulia Tymoshenko is the head of the government of Ukraine from Mar, 2010 to Mar, 2010. 
 Serhiy Arbuzov is the head of the government of Ukraine from Jan, 2014 to Feb, 2014. 
 Yuriy Yekhanurov is the head of the government of Ukraine from May, 2006 to Aug, 2006.

Answer:
user
Yulia Tymoshenko
Oleksiy Honcharuk
Denys Shmyhal
Mykola Azarov
Yuriy Yekhanurov
Arseniy Yatsenyuk
Viktor Yanukovych
Serhiy Arbuzov
Pavlo Lazarenko
assistant
Question:
Who was the head of Ukraine in May, 2018?

Context:
 Mykola Azarov is the head of the government of Ukraine from Mar, 2010 to Jan, 2014. 
 Pavlo Lazarenko is the head of the government of Ukraine from May, 1996 to Jun, 1997. 
 Arseniy Yatsenyuk is the head of the government of Ukraine from Feb, 2014 to Apr, 2016. 
 Oleksiy Honcharuk is the head of the government of Ukraine from Aug, 2019 to Mar, 2020. 
 Viktor Yanukovych is the head of the government of Ukraine from Nov, 2007 to Dec, 2007. 
 Volodymyr Groysman is the head of the government of Ukraine from Apr, 2016 to Aug, 2019. 
 Denys Shmyhal is the head of the government of Ukraine from Mar, 2020 to Dec, 2022. 
 Yulia Tymoshenko is the head of the government of Ukraine from Mar, 2010 to Mar, 2010. 
 Serhiy Arbuzov is the head of the government of Ukraine from Jan, 2014 to Feb, 2014. 
 Yuriy Yekhanurov is the head of the government of Ukraine from May, 2006 to Aug, 2006.

Answer:
user
Volodymyr Groysman
assistant