Question:
Who was the head of state of Portugal in Feb, 1991?

Context:
 Mário Soares is the head of the state of Portugal from Mar, 1986 to Mar, 1996. 
 Marcelo Rebelo de Sousa is the head of the state of Portugal from Mar, 2016 to Dec, 2022. 
 Jorge Sampaio is the head of the state of Portugal from Mar, 1996 to Mar, 2006. 
 Aníbal Cavaco Silva is the head of the state of Portugal from Mar, 2006 to Mar, 2016.

Answer:
Question:
Who was the head of state of Portugal in Feb, 1991?

Context:
 Mário Soares is the head of the state of Portugal from Mar, 1986 to Mar, 1996. 
 Marcelo Rebelo de Sousa is the head of the state of Portugal from Mar, 2016 to Dec, 2022. 
 Jorge Sampaio is the head of the state of Portugal from Mar, 1996 to Mar, 2006. 
 Aníbal Cavaco Silva is the head of the state of Portugal from Mar, 2006 to Mar, 2016.

Answer:
user
Mário Soares
assistant
Question:
Who was the head of state of Portugal in Feb, 1991?

Context:
 Mário Soares is the head of the state of Portugal from Mar, 1986 to Mar, 1996. 
 Marcelo Rebelo de Sousa is the head of the state of Portugal from Mar, 2016 to Dec, 2022. 
 Jorge Sampaio is the head of the state of Portugal from Mar, 1996 to Mar, 2006. 
 Aníbal Cavaco Silva is the head of the state of Portugal from Mar, 2006 to Mar, 2016.

Answer:
user
Aníbal Cavaco Silva
Marcelo Rebelo de Sousa
Jorge Sampaio
assistant
Question:
Who was the head of state of Portugal in Feb, 1991?

Context:
 Mário Soares is the head of the state of Portugal from Mar, 1986 to Mar, 1996. 
 Marcelo Rebelo de Sousa is the head of the state of Portugal from Mar, 2016 to Dec, 2022. 
 Jorge Sampaio is the head of the state of Portugal from Mar, 1996 to Mar, 2006. 
 Aníbal Cavaco Silva is the head of the state of Portugal from Mar, 2006 to Mar, 2016.

Answer:
user
Mário Soares
assistant