Background: Steven Siro Vai (; born June 6, 1960) is an American guitarist, composer, singer, songwriter, and producer. He was voted the "10th Greatest Guitarist" by Guitar World magazine, and has sold over 15 million records. A three-time Grammy Award winner and fifteen-time nominee, Vai started his music career in 1978 at the age of 18 as a transcriptionist for Frank Zappa, and joined his band from 1980 to 1983. He embarked on a solo career in 1983 and has released eight solo albums to date.
Context: Steve Vai, a descendant of Italian immigrants, was born in Carle Place, New York on June 6, 1960. He is the fourth son of John and Theresa Vai. He described his first experiences with music as, "at the age of five I walked up to [a] piano, hit a note, and noticed that to the right the notes go higher and to the left the notes go lower. In that very moment, I had a full-on epiphany. I was flooded with the instinctual realization of how music was created and how it worked from a theoretical standpoint--the whole language of music was very obvious. I also understood immediately, instinctually, and unequivocally something that has only deepened through the years that the creation of music is an infinite personal expression. I realized that I could do this, I could make music, and it could be whatever I want."  It was a year later, at the age of six, that Vai experienced his first introduction to the guitar, remembering that, "I saw this nine-year-old boy playing the guitar in my grade school auditorium, and that was another epiphany that I had. It was my first recognition of the instrument. When I saw that guitar and I saw this kid playing it, I knew instinctually that I was going to play the guitar someday, and that it would be my instrument. Don't ask me how I knew, I just knew. It was the coolest thing I had ever seen."  As a young child, Vai was influenced by the music his parents had listened to. One album in particular that he cites as his "musical awakening" was the original motion picture soundtrack to the 1961 film West Side Story. At age eleven, Vai was introduced to the contemporary rock and progressive music of the era, and after hearing the guitar solo to Led Zeppelin's "Heartbreaker" at age twelve, decided to begin playing the guitar.  In 1973, Vai began to take guitar lessons from fellow New York native Joe Satriani, and played in local bands (The Ohio Express, Circus, and Rayge) throughout his high school years. Vai cites artists such as Jimmy Page, Brian May, Ritchie Blackmore, Jeff Beck, Jimi Hendrix, as well as jazz fusion guitarists Allan Holdsworth and Al Di Meola as some of his major influences in that time period. In 1978, to further pursue his interest in music composition and theory, Vai attended Berklee College of Music in Boston, Massachusetts. While at Berklee, Vai began working for Frank Zappa as a transcriptionist, and in the middle of his fourth semester, moved to California to start his career as a session and touring artist for Zappa. Also while at Berklee, Vai met his future spouse Pia Maiocco, with whom he has been together since; they have two children. In 2000, Vai was awarded an Honorary Doctorate of Music from Berklee.
Question: Does he have any siblings?
Answer: He is the fourth son of John and Theresa Vai.

Background: Vlachs (English:  or , or rarely ) is a historical term and exonym used for the Eastern Romance-speaking peoples especially in the Balkans. The term also became a synonym in the Balkans for the social category of shepherds, and was also used for non-Romance-speaking peoples, in recent times in the western Balkans derogatively. Apart from the Romanians and Moldovans, there are indigenous Romance-speaking groups in Greece, Albania and Macedonia, such as the Aromanians and Megleno-Romanians. "Vlachs" were initially identified and described during the 11th century by George Kedrenos.
Context: In 1213 an army of Romans (Vlachs), Transylvanian Saxons, and Pechenegs, led by Ioachim of Sibiu, attacked the Bulgars and Cumans from Vidin. After this, all Hungarian battles in the Carpathian region were supported by Romance-speaking soldiers from Transylvania.  At the end of the 13th century, during the reign of Ladislaus the Cuman, Simon de Keza wrote about the Blacki people and placed them in Pannonia with the Huns. Archaeological discoveries indicate that Transylvania was gradually settled by the Magyars, and the last region defended by the Vlachs and Pechenegs (until 1200) was between the Olt River and the Carpathians.  Shortly after the fall of the Olt region, a church was built at the Carta Monastery and Catholic German-speaking settlers from Rhineland and Mosel Valley (known as Transylvanian Saxons) began to settle in the Orthodox region. In the Diploma Andreanum issued by King Andrew II of Hungary in 1224, "silva blacorum et bissenorum" was given to the settlers. The Orthodox Vlachs spread further northward along the Carpathians to Poland, Slovakia, and Moravia and were granted autonomy under Ius Vlachonicum (Walachian law).  In 1285 Ladislaus the Cuman fought the Tatars and Cumans, arriving with his troops at the Moldova River. A town, Baia (near the said river), was documented in 1300 as settled by the Transylvanian Saxons (see also Foundation of Moldavia). In 1290 Ladislaus the Cuman was assassinated; the new Hungarian king allegedly drove voivode Radu Negru and his people across the Carpathians, where they formed Wallachia along with its first capital Campulung (see also Foundation of Wallachia).
Question: what was special about these people?
Answer:
Transylvania was gradually settled by the Magyars, and the last region defended by the Vlachs and Pechenegs (until 1200) was between the Olt River and the Carpathians.