Question: How many people are in the executive branch senate in the city where the creator of The Vegetative Sculpture died?

full_context: Document 1: Bernd Luz: Bernd Luz (born May 20, 1966 in Rottweil, Germany) is a contemporary German visual artist and communication designer, whose work bridges the divide between independent art and commissioned work, the abstract and objective.
Document 2: Vegetative Sculpture I: Vegetative Sculpture I is a public art work by artist Bernhard Heiliger located at the Lynden Sculpture Garden near Milwaukee, Wisconsin. The sculpture has an abstract form; it is installed on the patio.
Document 3: Bernhard Heiden: Bernhard Heiden (b. Frankfurt-am-Main, August 24, 1910; d. Bloomington, IN, April 30, 2000) was a German and American composer and music teacher, who studied under and was heavily influenced by Paul Hindemith. Bernhard Heiden, the son of Ernst Levi and Martha (Heiden-Heimer) was originally named Bernhard Levi, but he later changed his name.
Document 4: Johannes Gutenberg: There are many statues of Gutenberg in Germany, including the famous one by Bertel Thorvaldsen (1837) at Gutenbergplatz in Mainz, home to the eponymous Johannes Gutenberg University of Mainz and the Gutenberg Museum on the history of early printing. The latter publishes the "Gutenberg-Jahrbuch", the leading periodical in the field.
Document 5: Geography of Germany: Germany comprises sixteen states that are collectively referred to as Länder. Each state has its own state constitution and is largely autonomous in regard to its internal organisation. Due to differences in size and population the subdivision of these states varies, especially between city states (Stadtstaaten) and states with larger territories (Flächenländer). For regional administrative purposes five states, namely Baden - Württemberg, Bavaria, Hesse, North Rhine - Westphalia and Saxony, consist of a total of 22 Government Districts (Regierungsbezirke). As of 2009 Germany is divided into 403 districts (Kreise) on municipal level, these consist of 301 rural districts and 102 urban districts.
Document 6: Floating Sculpture No. 3: Floating Sculpture No. 3 is a public art work by artist Marta Pan located at the Lynden Sculpture Garden near Milwaukee, Wisconsin. The red fiberglass sculpture is kinetic; it is installed in the pond.
Document 7: States of Germany: The Districts of Germany (Kreise) are administrative districts, and every state except the city-states of Berlin, Hamburg, and Bremen consists of "rural districts" (Landkreise), District-free Towns/Cities (Kreisfreie Städte, in Baden-Württemberg also called "urban districts", or Stadtkreise), cities that are districts in their own right, or local associations of a special kind (Kommunalverbände besonderer Art), see below. The state Free Hanseatic City of Bremen consists of two urban districts, while Berlin and Hamburg are states and urban districts at the same time.
Document 8: Unfolding (sculpture): Unfolding is a public art work by artist Bernhard Heiliger located at the Lynden Sculpture Garden near Milwaukee, Wisconsin. The sculpture has an abstract form; it is installed on the patio.
Document 9: Joint Senate of the Supreme Courts of the Federation: The Joint Senate of the Federal Supreme Courts of Justice ("Gemeinsamer Senat der Obersten Gerichtshöfe des Bundes", also called the "Common Senate") is often regarded as one of the supreme courts of justice in Germany, but it is rather, as its name suggests, an "ad hoc" judicial body that is convened only in specific cases. The Joint Senate consists of the Presidents of the five Federal Supreme Courts (excluding the Federal Constitutional Court) and two members of each of the Senates involved ("Senate" here denotes a judicial 'sub-unit' within a court, usually consisting of three or more judges, with all Federal Supreme Courts and subordinate courts of appeal being divided into several senates). The Joint Senate decides on questions regarding the interpretation of law that are relevant for all five branches of law overseen by the five Federal Supreme Courts.
Document 10: States of Germany: Local associations of a special kind are an amalgamation of one or more Landkreise with one or more Kreisfreie Städte to form a replacement of the aforementioned administrative entities at the district level. They are intended to implement simplification of administration at that level. Typically, a district-free city or town and its urban hinterland are grouped into such an association, or Kommunalverband besonderer Art. Such an organization requires the issuing of special laws by the governing state, since they are not covered by the normal administrative structure of the respective states.
Document 11: States of Germany: The governments in Berlin, Bremen and Hamburg are designated by the term Senate. In the three free states of Bavaria, Saxony, and Thuringia the government is referred to as the State Government (Staatsregierung), and in the other ten states the term Land Government (Landesregierung) is used. Before January 1, 2000, Bavaria had a bicameral parliament, with a popularly elected Landtag, and a Senate made up of representatives of the state's major social and economic groups. The Senate was abolished following a referendum in 1998. The states of Berlin, Bremen, and Hamburg are governed slightly differently from the other states. In each of those cities, the executive branch consists of a Senate of approximately eight, selected by the state's parliament; the senators carry out duties equivalent to those of the ministers in the larger states. The equivalent of the Minister-President is the Senatspräsident (President of the Senate) in Bremen, the Erster Bürgermeister (First Mayor) in Hamburg, and the Regierender Bürgermeister (Governing Mayor) in Berlin. The parliament for Berlin is called the Abgeordnetenhaus (House of Representatives), while Bremen and Hamburg both have a Bürgerschaft. The parliaments in the remaining 13 states are referred to as Landtag (State Parliament).
Document 12: Bernhard Heiliger: Bernhard Heiliger (11 November 1915, Stettin - 25 October 1995, Berlin) was a German artist. He was considered "West Germany's foremost sculptor", and his large public artworks are a prominent presence in many German cities, especially Berlin.
Document 13: Way Four: Way Four is a public art work by artist Bernard Kirschenbaum at the Lynden Sculpture Garden near Milwaukee, Wisconsin. The stainless steel sculpture is an open circle that creates an orbit for two triangles; it is installed on the lawn.
Document 14: Bernhard Mann: Bernhard Mann (born in Stuttgart, Germany, 3 December 1950) is a Social Scientist and Master of Public Health, Professor emeritus of Health and Social Management at the FHM Bielefeld - University of Applied Sciences, former Professor of Health Management and Vice-President at the University of Applied Sciences Bamberg, Adjunct Professor of Public Health, Social Medicine and Sociology at the University of Koblenz-Landau, at the Berlin School of Public Health - Charité, Medical University, at several Universities of Educational Cooperation as well as of Applied Sciences and Public-Health-Coordinator of the german program at the IESS - Institut Européen des Sciences de la Santé Casablanca, Maroc. Since 2018 Mann is editorial member of the World Journal of Public Health. He is a Politician, representative of the Social Democratic Party.
Document 15: Twist for Max: Twist for Max is a public art work by artist Bernard Kirschenbaum located at the Lynden Sculpture Garden near Milwaukee, Wisconsin. The abstract sculpture is a column of twisting aluminum; it is installed on the lawn.
ground_truth: eight
sub_queries: The Vegetative Sculpture I was made by whom? Answer: Bernhard Heiliger
What city did Bernhard Heiliger live when he died? Answer: Berlin
How many people are in the executive branch senate in Berlin ? Answer: eight