user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: What school did the subject of the picture "Matthias Jacob Schleiden" attend? 
Knowledge Triplets: m.045z7b5, education.education.institution, Heidelberg University
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Matthias Jacob Schleiden, common.image.appears_in_topic_gallery, Matthias Jakob Schleiden
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Heidelberg University, education.educational_institution.colors, Carmine
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m.012f1fy6, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, common.topic.article, m.0dd3_
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, The book  changed the teaching of botany and was reprinted frequently and translated into many different languages.
Matthias Jakob Schleiden, common.topic.image, Matthias Jakob Schleiden
m.0w5msty, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schleiden studied for a law degree and established a legal practice in Hamburg before turning to natural science.
m.0sw1jwc, education.education.institution, Heidelberg University
m.0n1lbsf, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, ernst wilhelm von brucke rejected theory of matthias jakob schleiden
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Matthias Jakob Schleiden, book.author.works_written, Principles of scientific botany
Matthias Jakob Schleiden, common.image.appears_in_topic_gallery, Matthias Jakob Schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, He also lambasted the nature philosophy of Schelling and Hegel.
m.0svws5m, education.education.institution, Heidelberg University
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Matthias Jakob Schleiden, common.topic.notable_types, Academic
Matthias Jakob Schleiden, common.topic.image, Matthias Jacob Schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schleiden refused an offer from Giessen University,  in 1846 became professor of botany at Jena in 1850.
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matthias jakob schleiden a pal of theodor schwann, base.kwebbase.kwconnection.sentence, Schleiden studied in the laboratory of the distinguished physiologist Muller and became friendly with Schwann, another of Muller's assistants.
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matthias jakob schleiden a pal of theodor schwann, base.kwebbase.kwconnection.subject, Matthias Jakob Schleiden
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Matthias Jakob Schleiden, common.topic.image, Die Entwickelung der Meduse (\"The Development of the Medusas\"), in Schleiden's Das Meer
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m.03llfv0, education.education.student, Matthias Jakob Schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden criticized views of frederick wilhelm joseph von schelling
m.04z8fcx, education.education.institution, Heidelberg University
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden studied under johannes peter muller
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Matthias Jakob Schleiden, people.person.place_of_birth, Hamburg
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matthias jakob schleiden criticized views of frederick wilhelm joseph von schelling, base.kwebbase.kwconnection.sentence, He also lambasted the nature philosophy of Schelling and Hegel.
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schleiden studied in the laboratory of the distinguished physiologist Muller and became friendly with Schwann, another of Muller's assistants.
m.0svyh4j, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, He was one of the first German scientists to recognize Charles Darwin's theory of evolution.
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, georg wilhelm friedrich hegel opposed by matthias jakob schleiden
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Matthias Jakob Schleiden, people.deceased_person.place_of_death, Frankfurt
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Matthias Jakob Schleiden, people.person.profession, Botanist
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, johannes peter muller taught matthias jakob schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schwann later independently extended this to cover all animal life.
Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Taught DuBois-Reymond.
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Matthias Jacob Schleiden, common.image.size, m.04s0b_7
Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, His work related to that of Brucke.
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, He was a great popularizer and his lectures were published in book form.
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden work related to ernst wilhelm von brucke
m.0w59l7b, education.education.institution, Heidelberg University
m.062wcfs, education.education.institution, Heidelberg University
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden had row with justus von liebig
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Matthias Jakob Schleiden, people.person.employment_history, m.04hxd5j
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, He also wrote on anthropological subjects and on the history of the Jews.
m.03lx3jt, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden a pal of theodor schwann
m.0cyycz1, education.education.institution, Heidelberg University
m.0n0hw83, education.education.institution, Heidelberg University
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, emil du bois-reymond taught by matthias jakob schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schleiden eventually felt restricted at Jena and left in 1862.
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, His lectures at Jena were packed, and he wrote on a wide range of scientific subjects.
Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, Schleiden had an aggressive nature and was constantly engaged in quarrels with other leading academics, among them Liebig and Schelling.
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, justus von liebig influenced matthias jakob schleiden
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_to, robert brown influenced matthias jakob schleiden
matthias jakob schleiden criticized views of frederick wilhelm joseph von schelling, base.kwebbase.kwconnection.subject, Matthias Jakob Schleiden
m.0w5lbxn, education.education.institution, Heidelberg University
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Matthias Jacob Schleiden, common.image.appears_in_topic_gallery, Matthias Jakob Schleiden
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Matthias Jakob Schleiden, people.person.gender, Male
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Matthias Jakob Schleiden, education.education.student, m.03llfv0
Matthias Jakob Schleiden, base.kwebbase.kwtopic.connections_from, matthias jakob schleiden criticized views of georg wilhelm friedrich hegel
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, In it he criticised earlier botanists for their vitalist belief that the fundamental processes of life could not be measured.
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Matthias Jakob Schleiden, people.person.education, m.03llfv0
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Matthias Jakob Schleiden, common.topic.notable_for, g.125dfb8f8
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, In 1842 the Swiss botanist Naegli came to Jena to study under Schleiden and together they published a botanical journal.
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Matthias Jakob Schleiden, people.person.nationality, Germany
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Heidelberg University, education.educational_institution.colors, Gold
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m.04hxd5j, business.employment_tenure.person, Matthias Jakob Schleiden
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Matthias Jakob Schleiden, base.kwebbase.kwtopic.has_sentences, In 1842 Schleiden published his major work, the botany textbook: \"Grundzuge der wissenschaftlichen Botanik\".

Answer: Heidelberg University