Question:
Who was the chair of Hokkaido Railway Company in Oct, 2013?

Context:
 Akio Koike is the chair of Hokkaido Railway Company from Jan, 2013 to Jan, 2014. 
 Hirohiko Kakinuma is the chair of Hokkaido Railway Company from Jan, 2011 to Jan, 2013. 
 Shin'ichi Sakamoto is the chair of Hokkaido Railway Company from Jan, 2003 to Jan, 2007. 
 Yoshihiro Ômori is the chair of Hokkaido Railway Company from Jan, 1996 to Jan, 2002.

Answer:
Question:
Who was the chair of Hokkaido Railway Company in Oct, 2013?

Context:
 Akio Koike is the chair of Hokkaido Railway Company from Jan, 2013 to Jan, 2014. 
 Hirohiko Kakinuma is the chair of Hokkaido Railway Company from Jan, 2011 to Jan, 2013. 
 Shin'ichi Sakamoto is the chair of Hokkaido Railway Company from Jan, 2003 to Jan, 2007. 
 Yoshihiro Ômori is the chair of Hokkaido Railway Company from Jan, 1996 to Jan, 2002.

Answer:
user
Akio Koike
assistant
Question:
Who was the chair of Hokkaido Railway Company in Oct, 2013?

Context:
 Akio Koike is the chair of Hokkaido Railway Company from Jan, 2013 to Jan, 2014. 
 Hirohiko Kakinuma is the chair of Hokkaido Railway Company from Jan, 2011 to Jan, 2013. 
 Shin'ichi Sakamoto is the chair of Hokkaido Railway Company from Jan, 2003 to Jan, 2007. 
 Yoshihiro Ômori is the chair of Hokkaido Railway Company from Jan, 1996 to Jan, 2002.

Answer:
user
Yoshihiro Ômori
Hirohiko Kakinuma
Shin'ichi Sakamoto
assistant
Question:
Who was the chair of Hokkaido Railway Company in Oct, 2013?

Context:
 Akio Koike is the chair of Hokkaido Railway Company from Jan, 2013 to Jan, 2014. 
 Hirohiko Kakinuma is the chair of Hokkaido Railway Company from Jan, 2011 to Jan, 2013. 
 Shin'ichi Sakamoto is the chair of Hokkaido Railway Company from Jan, 2003 to Jan, 2007. 
 Yoshihiro Ômori is the chair of Hokkaido Railway Company from Jan, 1996 to Jan, 2002.

Answer:
user
Akio Koike
assistant