Question:
Who was the head of Mexico in Oct, 1997?

Context:
 Andrés Manuel López Obrador is the head of the government of Mexico from Dec, 2018 to Dec, 2022. 
 Ernesto Zedillo is the head of the government of Mexico from Jan, 1994 to Jan, 2000. 
 Felipe Calderón is the head of the government of Mexico from Dec, 2006 to Dec, 2012. 
 Enrique Peña Nieto is the head of the government of Mexico from Dec, 2012 to Dec, 2018. 
 Vicente Fox Quesada is the head of the government of Mexico from Jan, 2000 to Jan, 2006.

Answer:
Question:
Who was the head of Mexico in Oct, 1997?

Context:
 Andrés Manuel López Obrador is the head of the government of Mexico from Dec, 2018 to Dec, 2022. 
 Ernesto Zedillo is the head of the government of Mexico from Jan, 1994 to Jan, 2000. 
 Felipe Calderón is the head of the government of Mexico from Dec, 2006 to Dec, 2012. 
 Enrique Peña Nieto is the head of the government of Mexico from Dec, 2012 to Dec, 2018. 
 Vicente Fox Quesada is the head of the government of Mexico from Jan, 2000 to Jan, 2006.

Answer:
user
Ernesto Zedillo
assistant
Question:
Who was the head of Mexico in Oct, 1997?

Context:
 Andrés Manuel López Obrador is the head of the government of Mexico from Dec, 2018 to Dec, 2022. 
 Ernesto Zedillo is the head of the government of Mexico from Jan, 1994 to Jan, 2000. 
 Felipe Calderón is the head of the government of Mexico from Dec, 2006 to Dec, 2012. 
 Enrique Peña Nieto is the head of the government of Mexico from Dec, 2012 to Dec, 2018. 
 Vicente Fox Quesada is the head of the government of Mexico from Jan, 2000 to Jan, 2006.

Answer:
user
Enrique Peña Nieto
Vicente Fox Quesada
Andrés Manuel López Obrador
Felipe Calderón
assistant
Question:
Who was the head of Mexico in Oct, 1997?

Context:
 Andrés Manuel López Obrador is the head of the government of Mexico from Dec, 2018 to Dec, 2022. 
 Ernesto Zedillo is the head of the government of Mexico from Jan, 1994 to Jan, 2000. 
 Felipe Calderón is the head of the government of Mexico from Dec, 2006 to Dec, 2012. 
 Enrique Peña Nieto is the head of the government of Mexico from Dec, 2012 to Dec, 2018. 
 Vicente Fox Quesada is the head of the government of Mexico from Jan, 2000 to Jan, 2006.

Answer:
user
Ernesto Zedillo
assistant