Question:
Who was the chair of Nigerian Federal Ministry of Education in Apr, 2011?

Context:
 Obiageli Katryn Ezekwesili is the chair of Nigerian Federal Ministry of Education from Jun, 2006 to Apr, 2007. 
 Ibrahim Shekarau is the chair of Nigerian Federal Ministry of Education from Jan, 2014 to Jan, 2015. 
 Adamu Adamu is the chair of Nigerian Federal Ministry of Education from Nov, 2015 to Dec, 2022. 
 Igwe Aja-Nwachukwu is the chair of Nigerian Federal Ministry of Education from Jun, 2007 to Dec, 2008. 
 Sam Egwu is the chair of Nigerian Federal Ministry of Education from Dec, 2008 to Mar, 2010. 
 Ruqayyah Ahmed Rufa'i is the chair of Nigerian Federal Ministry of Education from Apr, 2010 to Sep, 2013.

Answer:
Question:
Who was the chair of Nigerian Federal Ministry of Education in Apr, 2011?

Context:
 Obiageli Katryn Ezekwesili is the chair of Nigerian Federal Ministry of Education from Jun, 2006 to Apr, 2007. 
 Ibrahim Shekarau is the chair of Nigerian Federal Ministry of Education from Jan, 2014 to Jan, 2015. 
 Adamu Adamu is the chair of Nigerian Federal Ministry of Education from Nov, 2015 to Dec, 2022. 
 Igwe Aja-Nwachukwu is the chair of Nigerian Federal Ministry of Education from Jun, 2007 to Dec, 2008. 
 Sam Egwu is the chair of Nigerian Federal Ministry of Education from Dec, 2008 to Mar, 2010. 
 Ruqayyah Ahmed Rufa'i is the chair of Nigerian Federal Ministry of Education from Apr, 2010 to Sep, 2013.

Answer:
user
Ruqayyah Ahmed Rufa'i
assistant
Question:
Who was the chair of Nigerian Federal Ministry of Education in Apr, 2011?

Context:
 Obiageli Katryn Ezekwesili is the chair of Nigerian Federal Ministry of Education from Jun, 2006 to Apr, 2007. 
 Ibrahim Shekarau is the chair of Nigerian Federal Ministry of Education from Jan, 2014 to Jan, 2015. 
 Adamu Adamu is the chair of Nigerian Federal Ministry of Education from Nov, 2015 to Dec, 2022. 
 Igwe Aja-Nwachukwu is the chair of Nigerian Federal Ministry of Education from Jun, 2007 to Dec, 2008. 
 Sam Egwu is the chair of Nigerian Federal Ministry of Education from Dec, 2008 to Mar, 2010. 
 Ruqayyah Ahmed Rufa'i is the chair of Nigerian Federal Ministry of Education from Apr, 2010 to Sep, 2013.

Answer:
user
Sam Egwu
Obiageli Katryn Ezekwesili
Adamu Adamu
Ibrahim Shekarau
Igwe Aja-Nwachukwu
assistant
Question:
Who was the chair of Nigerian Federal Ministry of Education in Apr, 2011?

Context:
 Obiageli Katryn Ezekwesili is the chair of Nigerian Federal Ministry of Education from Jun, 2006 to Apr, 2007. 
 Ibrahim Shekarau is the chair of Nigerian Federal Ministry of Education from Jan, 2014 to Jan, 2015. 
 Adamu Adamu is the chair of Nigerian Federal Ministry of Education from Nov, 2015 to Dec, 2022. 
 Igwe Aja-Nwachukwu is the chair of Nigerian Federal Ministry of Education from Jun, 2007 to Dec, 2008. 
 Sam Egwu is the chair of Nigerian Federal Ministry of Education from Dec, 2008 to Mar, 2010. 
 Ruqayyah Ahmed Rufa'i is the chair of Nigerian Federal Ministry of Education from Apr, 2010 to Sep, 2013.

Answer:
user
Ruqayyah Ahmed Rufa'i
assistant