Please answer the following question: Information:  - Electrical engineering is a field of engineering that generally deals with the study and application of electricity, electronics, and electromagnetism. This field first became an identifiable occupation in the later half of the 19th century after commercialization of the electric telegraph, the telephone, and electric power distribution and use. Subsequently, broadcasting and recording media made electronics part of daily life. The invention of the transistor, and later the integrated circuit, brought down the cost of electronics to the point they can be used in almost any household object.  - Habilitation is a post-doctoral qualification or academic degree at some European and Central Asian, North African, and Latin American universities. It is conferred for a habilitation thesis based on independent scholarship, which was reviewed by and successfully defended before an academic committee in a process similar to that of a doctoral dissertation. In some countries, a habilitation degree is a required formal qualification to independently teach and examine a designated subject at the university level.  - Language is the ability to acquire and use complex systems of communication, particularly the human ability to do so, and a language is any specific example of such a system. The scientific study of language is called linguistics. Questions concerning the philosophy of language, such as whether words can represent experience, have been debated since Gorgias and Plato in Ancient Greece. Thinkers such as Rousseau have argued that language originated from emotions while others like Kant have held that it originated from rational and logical thought. 20th-century philosophers such as Wittgenstein argued that philosophy is really the study of language. Major figures in linguistics include Ferdinand de Saussure and Noam Chomsky.  - A philosopher is someone who practices philosophy, which involves rational inquiry into areas that are outside of either theology or science. The term "philosopher" comes from the Ancient Greek ("philosophos") meaning "lover of wisdom". The coining of the term has been attributed to the Greek thinker Pythagoras (6th century BC).  - In linguistics, grammar is the set of structural rules governing the composition of clauses, phrases, and words in any given natural language. The term refers also to the study of such rules, and this field includes morphology, syntax, and phonology, often complemented by phonetics, semantics, and pragmatics.  - Philosophy (from Greek , "philosophia", literally "love of wisdom") is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language. The term was probably coined by Pythagoras (c. 570  c. 495 BC). Philosophical methods include questioning, critical discussion, rational argument and systematic presentation. Classic philosophical questions include: Is it possible to know anything and to prove it? What is most real? However, philosophers might also pose more practical and concrete questions such as: Is there a best way to live? Is it better to be just or unjust (if one can get away with it)? Do humans have free will?  - ConTEXT is a text editor for Microsoft Windows. It has built-in syntax highlighters for C, C++, Pascal, Delphi, FORTRAN, 80x86 assembler, Java, JavaScript, Visual Basic, Perl, CGI, HTML, SQL, Python, PHP, Tcl, Tk and its own syntax highlighter definition language. Other features are code templates and the ability to work with several document windows using the Multiple Document Interface. ConTEXT can integrate compilers to compile source code from within the editor, and run external tools to manipulate loaded files (e.g. Pretty Printer). The output of such external programs, e.g. error messages, can be captured for further use. Incremental search and basic regular expressions are supported for searching and replacing. ConTEXT is available in many languages.  - Ulrich Wilhelm Kohlenbach ( * July 27 , 1962 in Frankfurt am Main ) is a German professor of mathematics and a researcher in logic . He graduated ( ' Abitur ' ) from Lessing - Gymnasium ( High School ) in 1980 and completed his studies of mathematics , philosophy , and linguistics with a master degree ( ' Diplom ' ) from the University of Frankfurt . In 1990 , he received his Ph.D. under H. Luckhardt and passed his Habilitation ( ' venia legendi ' ) in mathematics five years later at the University of Frankfurt . In 1998 , he became an associate professor at the University of Aarhus in Denmark where he worked until 2004 . Kohlenbach is now a full professor at the Technische Universität Darmstadt . He is married to Gabriele Bahl - Kohlenbach with whom he has a daughter . His research interests lie in the field of `` proof mining '' ( see also ) .  - Reason is the capacity for consciously making sense of things, applying logic, establishing and verifying facts, and changing or justifying practices, institutions, and beliefs based on new or existing information. It is closely associated with such characteristically human activities as philosophy, science, language, mathematics, and art and is normally considered to be a definitive characteristic of human nature. Reason, or an aspect of it, is sometimes referred to as rationality.   - Linguistics is the scientific study of language, and involves an analysis of language form, language meaning, and language in context. The earliest activities in the documentation and description of language have been attributed to the 4th century BCE Indian grammarian Pini who wrote a formal description of the Sanskrit language in his "".  - Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin. Other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart and Düsseldorf.  - Pythagoras of Samos ( or simply ;  in Ionian Greek) was an Ionian Greek philosopher, mathematician, and the putative founder of the movement called Pythagoreanism. Most of the information about Pythagoras was written down centuries after he lived, so very little reliable information is known about him. He was born on the island of Samos, and travelled, visiting Egypt and Greece, and maybe India. Around 530 BC, he moved to Croton, in Magna Graecia, and there established some kind of school or guild. In 520 BC, he returned to Samos.  - Pini is known for his text "Ashtadhyayi", a sutra-style treatise on Sanskrit grammar, estimated to have been completed between 6th and 4th century BCE. His 3,959 verses on linguistics, syntax and semantics in "eight chapters" is the foundational text of the "Vykaraa" branch of the Vedanga, the auxiliary scholarly disciplines of the Vedic period. His aphoristic text attracted numerous "bhasya" (commentaries), of which Patanjali's "Mahabhasya" is the most famous in Hindu traditions. His ideas influenced and attracted commentaries from scholars of other Indian religions such as Buddhism.   - The Technische Universität Darmstadt (unofficially Technical University of Darmstadt or Darmstadt University of Technology), commonly referred to as TU Darmstadt is a research university in the city of Darmstadt, Germany. It was founded in 1877 and received the right to award doctorates in 1899. In 1882 it was the first university in the world to set up a chair in electrical engineering, and founded the first faculty for it in 1883.  - A research university is a university that expects all its tenured and tenure-track faculty to continuously engage in research, as opposed to merely requiring it as a condition of an initial appointment or tenure. Such universities can be recognized by their strong focus on innovative research and the prestige of their brand names. On the one hand, research universities strive to recruit faculty who are the most brilliant minds in their disciplines in the world, and their students enjoy the opportunity to learn from such experts. On the other hand, new students are often disappointed to realize their undergraduate courses at research universities are overly academic and fail to provide vocational training with immediate "real world" applications; but many employers value degrees from research universities because they know that such coursework develops fundamental skills like critical thinking.     After reading the paragraphs above, we are interested in knowing the entity with which 'ulrich kohlenbach' exhibits the relationship of 'occupation'. Find the answer from the choices below.  Choices: - academic  - engineering  - faculty  - general  - grammarian  - integrated circuit  - linguistics  - major  - mathematician  - member  - philosopher  - research  - sanskrit  - science  - teach  - text editor
A:
mathematician