Question:
Who was the head of Aachen in Jul, 2019?

Context:
 Kurt Malangré is the head of the government of Aachen from Jan, 1973 to Oct, 1989. 
 Albert Maas is the head of the government of Aachen from Jan, 1946 to Jan, 1952. 
 Marcel Philipp is the head of the government of Aachen from Oct, 2009 to Nov, 2020. 
 Sibylle Keupen is the head of the government of Aachen from Nov, 2020 to Dec, 2022. 
 Jürgen Linden is the head of the government of Aachen from Oct, 1989 to Oct, 2009. 
 Hermann Heusch is the head of the government of Aachen from Jan, 1952 to Jan, 1973.

Answer:
Question:
Who was the head of Aachen in Jul, 2019?

Context:
 Kurt Malangré is the head of the government of Aachen from Jan, 1973 to Oct, 1989. 
 Albert Maas is the head of the government of Aachen from Jan, 1946 to Jan, 1952. 
 Marcel Philipp is the head of the government of Aachen from Oct, 2009 to Nov, 2020. 
 Sibylle Keupen is the head of the government of Aachen from Nov, 2020 to Dec, 2022. 
 Jürgen Linden is the head of the government of Aachen from Oct, 1989 to Oct, 2009. 
 Hermann Heusch is the head of the government of Aachen from Jan, 1952 to Jan, 1973.

Answer:
user
Marcel Philipp
assistant
Question:
Who was the head of Aachen in Jul, 2019?

Context:
 Kurt Malangré is the head of the government of Aachen from Jan, 1973 to Oct, 1989. 
 Albert Maas is the head of the government of Aachen from Jan, 1946 to Jan, 1952. 
 Marcel Philipp is the head of the government of Aachen from Oct, 2009 to Nov, 2020. 
 Sibylle Keupen is the head of the government of Aachen from Nov, 2020 to Dec, 2022. 
 Jürgen Linden is the head of the government of Aachen from Oct, 1989 to Oct, 2009. 
 Hermann Heusch is the head of the government of Aachen from Jan, 1952 to Jan, 1973.

Answer:
user
Sibylle Keupen
Albert Maas
Jürgen Linden
Kurt Malangré
Hermann Heusch
assistant
Question:
Who was the head of Aachen in Jul, 2019?

Context:
 Kurt Malangré is the head of the government of Aachen from Jan, 1973 to Oct, 1989. 
 Albert Maas is the head of the government of Aachen from Jan, 1946 to Jan, 1952. 
 Marcel Philipp is the head of the government of Aachen from Oct, 2009 to Nov, 2020. 
 Sibylle Keupen is the head of the government of Aachen from Nov, 2020 to Dec, 2022. 
 Jürgen Linden is the head of the government of Aachen from Oct, 1989 to Oct, 2009. 
 Hermann Heusch is the head of the government of Aachen from Jan, 1952 to Jan, 1973.

Answer:
user
Marcel Philipp
assistant