Please answer the following question: What type of details about deyan vatchkov can be gathered from the following bio? Bio: deyan vatchkov -lrb- -rrb- , born april 8 , 1979 , in sofia , bulgaria is a bulgarian opera singer bass . a native of sofia -lrb- bulgaria -rrb- he studied vocal technique in the conservatory of sofia with prof.karapetrov and later in the academy of la scala with leyla gencer and luciana serra . he won international competitions including the iris adami corradetti 's first prize and special arrigo boito prize in padua and belvedere 's verdi prize and special chamber opera prize as a result of it he made his debut in the role of don basilio in il barbiere di siviglia in wien . he performs in teatro alla scala , arena di verona , la fenice di venezia , giuseppe verdi di trieste , teatro comunale in bologna , san carlo in naples , teatro regio di torino , teatro carlo felice di genova , sferisterio festival di macerata , puccini festival torre del lago , teatro real di madrid , palau de les arts di valencia , abao di bilbao , amsterdam , lausanne , frankfurt , leipzig , tokyo , toronto , seattle etc. . he worked with lorin maazel , riccardo muti , nicola luisotti , riccardo chailly , daniel oren , daniele gatti , marcello viotti .
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