Dobrado de Mario Zan

The user is asking for a biography of the composer of a specific piece: "Dobrado de Mario Zan". The title "Dobrado de Mario Zan" translates to "March (Dobrado) by Mario Zan". This implies the composer is **Mario Zan**. I need to find information about Mario Zan (likely a Brazilian composer, given the term "Dobrado" and the name). Let's check knowledge base for Mario Zan. Mario Zan (Mário Zanotto or similar?) - Actually, **Mário Zan** (Mário Zanotto) is a very famous Brazilian composer/accordionist/singer, known as "O Rei do Bailão" (The King of the Dance Hall). He was born in 1920? No, let's verify. Mário Zan (Mário Zanotto): Born January 6, 1921 (or 1920?) in São Paulo, died July 16, 2003. Style: Brazilian folk, "música caipira", "vanerão", "xote", "bailão", polkas, dobrados. Famous works: "Cabocla Tereza", "Verdadeira Amizade", "Saudade da Minha Terra", "Moda da Mula", "É Proibido Cochilar". Wait, the prompt asks for the composer of the *music for band* "Dobrado de Mario Zan". There is a specific *dobrado* (march style for concert band) *titled* "Dobrado de Mario Zan" or perhaps *dedicated* to him, or composed *by* him for band. However, Mário Zan is primarily known as an accordionist and singer of *música sertaneja/caipira*. He wrote many songs that were arranged for band. But there is a specific composer named **Mario Zan** who writes for concert band? Or is the prompt referring to the *person* Mario Zan? Usually, a "Dobrado" title follows the pattern "Dobrado [Name]". E.g., "Dobrado Presidente Vargas". If the piece is called "Dobrado de Mario Zan", it likely means "March *by* Mario Zan" or "March *dedicated to* Mario Zan". Given the instruction "composer of music for band 'Dobrado de Mario Zan'", the prompt treats "Dobrado de Mario Zan" as the *name of the composer* or the *title of the work*? "compositor de música para banda 'Dobrado de Mario Zan'". This syntax is ambiguous. Interpretation A: The composer's name is "Dobrado de Mario Zan". (Unlikely). Interpretation B: The work is "Dobrado de Mario Zan", write a bio of its composer. If the work is "Dobrado de Mario Zan", the composer is likely **Mário Zan** (Mário Zanotto). Let's assume the subject is **Mário Zan (Mário Zanotto)**. Birth: January 6, 1921 (Some sources say 1920) in Ituverava, SP (or São Paulo capital?). Death: July 16, 2003 in São Paulo. Style: Música caipira, sertaneja raiz, vanerão, xote, polka, dobrado. Highlight: Accordionist, singer, composer. "Rei do Bailão". Works: "Cabocla Tereza", "Verdadeira Amizade", "Saudade da Minha Terra", "Moda da Mula", "Chico Mineiro" (interpretation), many dobrados for band/accordion. Wait, is there a specific *band composer* named Mario Zan distinct from