Question:
Who was the head of Heilbronn in Jan, 1978?

Context:
 Harry Mergel is the head of the government of Heilbronn from May, 2014 to Dec, 2022. 
 Manfred Weinmann is the head of the government of Heilbronn from Jan, 1983 to Jan, 1999. 
 Helmut Himmelsbach is the head of the government of Heilbronn from Jan, 1999 to May, 2014. 
 Hans Hoffmann is the head of the government of Heilbronn from Jan, 1967 to Jan, 1983.

Answer:
Question:
Who was the head of Heilbronn in Jan, 1978?

Context:
 Harry Mergel is the head of the government of Heilbronn from May, 2014 to Dec, 2022. 
 Manfred Weinmann is the head of the government of Heilbronn from Jan, 1983 to Jan, 1999. 
 Helmut Himmelsbach is the head of the government of Heilbronn from Jan, 1999 to May, 2014. 
 Hans Hoffmann is the head of the government of Heilbronn from Jan, 1967 to Jan, 1983.

Answer:
user
Hans Hoffmann
assistant
Question:
Who was the head of Heilbronn in Jan, 1978?

Context:
 Harry Mergel is the head of the government of Heilbronn from May, 2014 to Dec, 2022. 
 Manfred Weinmann is the head of the government of Heilbronn from Jan, 1983 to Jan, 1999. 
 Helmut Himmelsbach is the head of the government of Heilbronn from Jan, 1999 to May, 2014. 
 Hans Hoffmann is the head of the government of Heilbronn from Jan, 1967 to Jan, 1983.

Answer:
user
Helmut Himmelsbach
Manfred Weinmann
Harry Mergel
assistant
Question:
Who was the head of Heilbronn in Jan, 1978?

Context:
 Harry Mergel is the head of the government of Heilbronn from May, 2014 to Dec, 2022. 
 Manfred Weinmann is the head of the government of Heilbronn from Jan, 1983 to Jan, 1999. 
 Helmut Himmelsbach is the head of the government of Heilbronn from Jan, 1999 to May, 2014. 
 Hans Hoffmann is the head of the government of Heilbronn from Jan, 1967 to Jan, 1983.

Answer:
user
Hans Hoffmann
assistant