Question: How many times did the plague occur in the birth city of the composer of Scanderbeg?

Knowledge 1: Scanderbeg (opera)
Scanderbeg (; RV 732) is an opera ("dramma per musica") in three acts composed by Antonio Vivaldi to an Italian libretto by Antonio Salvi. It was first performed at the Teatro della Pergola in Florence on 22 June 1718 to mark the re-opening of the theatre to public performances. While the libretto has been preserved, only fragments of the original score remain. [SEP] Knowledge 2: Orlando furioso (Vivaldi, 1714)
Orlando furioso RV 819 (, Teatro San Angelo, Venice 1714) is a three-act opera surviving in manuscript in Antonio Vivaldi's personal library, only partly related to his better known Orlando furioso (RV 728) of 1727. It is a recomposition of an "Orlando furioso" written by Giovanni Alberto Ristori which had been very successfully staged by Vivaldi and his father's "impresa" in 1713, and whose music survives in a few fragments retained in the score of RV 819. Therefore, Vivaldi's first cataloguer Peter Ryom did not assign the opera a RV number, but catalogued it as RV Anh. 84. The libretto was by Grazio Braccioli. [SEP] Knowledge 3: Black Death
In 1466, perhaps 40,000 people died of the plague in Paris. During the 16th and 17th centuries, the plague was present in Paris around 30 per cent of the time. The Black Death ravaged Europe for three years before it continued on into Russia, where the disease was present somewhere in the country 25 times between 1350 to 1490. Plague epidemics ravaged London in 1563, 1593, 1603, 1625, 1636, and 1665, reducing its population by 10 to 30% during those years. Over 10% of Amsterdam's population died in 1623–25, and again in 1635–36, 1655, and 1664. Plague occurred in Venice 22 times between 1361 and 1528. The plague of 1576–77 killed 50,000 in Venice, almost a third of the population. Late outbreaks in central Europe included the Italian Plague of 1629–1631, which is associated with troop movements during the Thirty Years' War, and the Great Plague of Vienna in 1679. Over 60% of Norway's population died in 1348–50. The last plague outbreak ravaged Oslo in 1654.
Knowledge 1: Orlando furioso (Vivaldi, 1714)
Orlando furioso RV 819 (, Teatro San Angelo, Venice 1714) is a three-act opera surviving in manuscript in Antonio Vivaldi's personal library, only partly related to his better known Orlando furioso (RV 728) of 1727. It is a recomposition of an "Orlando furioso" written by Giovanni Alberto Ristori which had been very successfully staged by Vivaldi and his father's "impresa" in 1713, and whose music survives in a few fragments retained in the score of RV 819. Therefore, Vivaldi's first cataloguer Peter Ryom did not assign the opera a RV number, but catalogued it as RV Anh. 84. The libretto was by Grazio Braccioli. [SEP] Knowledge 2: Black Death
In 1466, perhaps 40,000 people died of the plague in Paris. During the 16th and 17th centuries, the plague was present in Paris around 30 per cent of the time. The Black Death ravaged Europe for three years before it continued on into Russia, where the disease was present somewhere in the country 25 times between 1350 to 1490. Plague epidemics ravaged London in 1563, 1593, 1603, 1625, 1636, and 1665, reducing its population by 10 to 30% during those years. Over 10% of Amsterdam's population died in 1623–25, and again in 1635–36, 1655, and 1664. Plague occurred in Venice 22 times between 1361 and 1528. The plague of 1576–77 killed 50,000 in Venice, almost a third of the population. Late outbreaks in central Europe included the Italian Plague of 1629–1631, which is associated with troop movements during the Thirty Years' War, and the Great Plague of Vienna in 1679. Over 60% of Norway's population died in 1348–50. The last plague outbreak ravaged Oslo in 1654. [SEP] Knowledge 3: Scanderbeg (opera)
Scanderbeg (; RV 732) is an opera ("dramma per musica") in three acts composed by Antonio Vivaldi to an Italian libretto by Antonio Salvi. It was first performed at the Teatro della Pergola in Florence on 22 June 1718 to mark the re-opening of the theatre to public performances. While the libretto has been preserved, only fragments of the original score remain.
Knowledge 1: Scanderbeg (opera)
Scanderbeg (; RV 732) is an opera ("dramma per musica") in three acts composed by Antonio Vivaldi to an Italian libretto by Antonio Salvi. It was first performed at the Teatro della Pergola in Florence on 22 June 1718 to mark the re-opening of the theatre to public performances. While the libretto has been preserved, only fragments of the original score remain. [SEP] Knowledge 2: Orlando furioso (Vivaldi, 1714)
Orlando furioso RV 819 (, Teatro San Angelo, Venice 1714) is a three-act opera surviving in manuscript in Antonio Vivaldi's personal library, only partly related to his better known Orlando furioso (RV 728) of 1727. It is a recomposition of an "Orlando furioso" written by Giovanni Alberto Ristori which had been very successfully staged by Vivaldi and his father's "impresa" in 1713, and whose music survives in a few fragments retained in the score of RV 819. Therefore, Vivaldi's first cataloguer Peter Ryom did not assign the opera a RV number, but catalogued it as RV Anh. 84. The libretto was by Grazio Braccioli. [SEP] Knowledge 3: Black Death
The Black Death, also known as the Great Plague, the Black Plague, or the Plague, was one of the most devastating pandemics in human history, resulting in the deaths of an estimated 75 to 200 million people in Eurasia and peaking in Europe from 1347 to 1351. The bacterium Yersinia pestis, which results in several forms of plague, is believed to have been the cause. The plague created a series of religious, social and economic upheavals, which had profound effects on the course of European history.

Answer: 22