Question: What is the coat of arms of the birthplace of the person who defined phonology in 1939 based on?

<P0-S0> He is widely considered to be the founder of morphophonology. <P0-S1> Prince Nikolai Sergeyevich Trubetzkoy (; Moscow, April 16, 1890 – Vienna, June 25, 1938) was a Russian linguist and historian whose teachings formed a nucleus of the Prague School of structural linguistics. <P0-S2> He was also associated with the Russian Eurasianists. <SEP> <P1-S0> natural phonology is a theory based on the publications of its proponent david stampe in 1969 and (more explicitly) in 1979. in this view, phonology is based on a set of universal phonological processes that interact with one another; which ones are active and which are suppressed is language-specific. <P1-S1> rather than acting on segments, phonological processes act on distinctive features within prosodic groups. <P1-S2> prosodic groups can be as small as a part of a syllable or as large as an entire utterance. <P1-S3> phonological processes are unordered with respect to each other and apply simultaneously (though the output of one process may be the input to another). <P1-S4> the second most prominent natural phonologist is patricia donegan (stampe's wife); there are many natural phonologists in europe, and a few in the u.s., such as geoffrey nathan. <P1-S5> the principles of natural phonology were extended to morphology by wolfgang u. dressler, who founded natural morphology. <SEP> <P2-S0> an influential school of phonology in the interwar period was the prague school. <P2-S1> one of its leading members was prince nikolai trubetzkoy, whose grundzüge der phonologie (principles of phonology), published posthumously in 1939, is among the most important works in the field from this period. <P2-S2> directly influenced by baudouin de courtenay, trubetzkoy is considered the founder of morphophonology, although this concept had also been recognized by de courtenay. <P2-S3> trubetzkoy also developed the concept of the archiphoneme. <P2-S4> another important figure in the prague school was roman jakobson, who was one of the most prominent linguists of the 20th century. <SEP> <P3-S0> The word phonology comes from the Greek φωνή, phōnḗ, "voice, sound," and the suffix -logy (which is from Greek λόγος, lógos, "word, speech, subject of discussion"). <P3-S1> Definitions of the term vary. <P3-S2> Nikolai Trubetzkoy in Grundzüge der Phonologie (1939) defines phonology as "the study of sound pertaining to the system of language," as opposed to phonetics, which is "the study of sound pertaining to the act of speech" (the distinction between language and speech being basically Saussure's distinction between langue and parole). <P3-S3> More recently, Lass (1998) writes that phonology refers broadly to the subdiscipline of linguistics concerned with the sounds of language, while in more narrow terms, "phonology proper is concerned with the function, behavior and organization of sounds as linguistic items." <P3-S4> According to Clark et al. <P3-S5> (2007), it means the systematic use of sound to encode meaning in any spoken human language, or the field of linguistics studying this use. <SEP> <P4-S0> The coat of arms of Moscow depicts a horseman with a spear in his hand slaying a basilisk and is identified with Saint George and the Dragon. <P4-S1> The heraldic emblem of Moscow has been an integral part of the coat of arms of Russia since the 16th century.