Question:
Who was the head of Brandenburg an der Havel in Feb, 1990?

Context:
 Helmut Schliesing is the head of the government of Brandenburg an der Havel from Jan, 1990 to Jan, 2002. 
 Elvira Lippitz is the head of the government of Brandenburg an der Havel from Jan, 1976 to Jan, 1985. 
 Dietlind Tiemann is the head of the government of Brandenburg an der Havel from Dec, 2003 to Oct, 2017. 
 Klaus Mühe is the head of the government of Brandenburg an der Havel from Jan, 1985 to Jan, 1990. 
 Helmut Schmidt is the head of the government of Brandenburg an der Havel from Jan, 2002 to Jan, 2003. 
 Steffen Scheller is the head of the government of Brandenburg an der Havel from Oct, 2017 to Dec, 2022.

Answer:
Helmut Schliesing