Question:
Who was the head of Ehime Prefecture in Aug, 2011?

Context:
 Sadatake Hisamatsu is the head of the government of Ehime Prefecture from May, 1951 to Jan, 1971. 
 Moriyuki Kato is the head of the government of Ehime Prefecture from Jan, 1999 to Nov, 2010. 
 Sadayuki Iga is the head of the government of Ehime Prefecture from Jan, 1987 to Jan, 1999. 
 Tokihiro Nakamura is the head of the government of Ehime Prefecture from Dec, 2010 to Dec, 2022. 
 Haruki Shiraishi is the head of the government of Ehime Prefecture from Jan, 1971 to Jan, 1987. 
 Shigetomi Aoki is the head of the government of Ehime Prefecture from Apr, 1947 to Apr, 1951.

Answer:
Question:
Who was the head of Ehime Prefecture in Aug, 2011?

Context:
 Sadatake Hisamatsu is the head of the government of Ehime Prefecture from May, 1951 to Jan, 1971. 
 Moriyuki Kato is the head of the government of Ehime Prefecture from Jan, 1999 to Nov, 2010. 
 Sadayuki Iga is the head of the government of Ehime Prefecture from Jan, 1987 to Jan, 1999. 
 Tokihiro Nakamura is the head of the government of Ehime Prefecture from Dec, 2010 to Dec, 2022. 
 Haruki Shiraishi is the head of the government of Ehime Prefecture from Jan, 1971 to Jan, 1987. 
 Shigetomi Aoki is the head of the government of Ehime Prefecture from Apr, 1947 to Apr, 1951.

Answer:
user
Tokihiro Nakamura
assistant
Question:
Who was the head of Ehime Prefecture in Aug, 2011?

Context:
 Sadatake Hisamatsu is the head of the government of Ehime Prefecture from May, 1951 to Jan, 1971. 
 Moriyuki Kato is the head of the government of Ehime Prefecture from Jan, 1999 to Nov, 2010. 
 Sadayuki Iga is the head of the government of Ehime Prefecture from Jan, 1987 to Jan, 1999. 
 Tokihiro Nakamura is the head of the government of Ehime Prefecture from Dec, 2010 to Dec, 2022. 
 Haruki Shiraishi is the head of the government of Ehime Prefecture from Jan, 1971 to Jan, 1987. 
 Shigetomi Aoki is the head of the government of Ehime Prefecture from Apr, 1947 to Apr, 1951.

Answer:
user
Shigetomi Aoki
Haruki Shiraishi
Sadayuki Iga
Moriyuki Kato
Sadatake Hisamatsu
assistant
Question:
Who was the head of Ehime Prefecture in Aug, 2011?

Context:
 Sadatake Hisamatsu is the head of the government of Ehime Prefecture from May, 1951 to Jan, 1971. 
 Moriyuki Kato is the head of the government of Ehime Prefecture from Jan, 1999 to Nov, 2010. 
 Sadayuki Iga is the head of the government of Ehime Prefecture from Jan, 1987 to Jan, 1999. 
 Tokihiro Nakamura is the head of the government of Ehime Prefecture from Dec, 2010 to Dec, 2022. 
 Haruki Shiraishi is the head of the government of Ehime Prefecture from Jan, 1971 to Jan, 1987. 
 Shigetomi Aoki is the head of the government of Ehime Prefecture from Apr, 1947 to Apr, 1951.

Answer:
user
Tokihiro Nakamura
assistant