Question:
Who was the head of Free Hanseatic City of Bremen in Jun, 1967?

Context:
 Klaus Wedemeier is the head of the government of Free Hanseatic City of Bremen from Sep, 1985 to Jul, 1995. 
 Erich Vagts is the head of the government of Free Hanseatic City of Bremen from May, 1945 to Jul, 1945. 
 Carsten Sieling is the head of the government of Free Hanseatic City of Bremen from Jul, 2015 to Aug, 2019. 
 Willi Dehnkamp is the head of the government of Free Hanseatic City of Bremen from Jul, 1965 to Nov, 1967. 
 Hans Koschnick is the head of the government of Free Hanseatic City of Bremen from Nov, 1967 to Sep, 1985. 
 Wilhelm Kaisen is the head of the government of Free Hanseatic City of Bremen from Jul, 1945 to Jul, 1965. 
 Jens Böhrnsen is the head of the government of Free Hanseatic City of Bremen from Nov, 2005 to Jul, 2015. 
 Henning Scherf is the head of the government of Free Hanseatic City of Bremen from Jul, 1995 to Nov, 2005. 
 Johannes Schroers is the head of the government of Free Hanseatic City of Bremen from Apr, 1945 to Apr, 1945. 
 Andreas Bovenschulte is the head of the government of Free Hanseatic City of Bremen from Aug, 2019 to Dec, 2022.

Answer:
Willi Dehnkamp