In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.

Question: Where was Billboard Frolics' creator born? Passage:Cantor appears in caricature form in numerous Looney Tunes cartoons produced for Warner Bros., although he was often voiced by an imitator. Beginning with I Like Mountain Music (1933), other animated Cantor cameos include Shuffle Off to Buffalo (Harman-Ising, 1933) and Billboard Frolics (Friz Freleng, 1935). Eddie Cantor is one of the four "down on their luck" stars (along with Bing Crosby, Al Jolson, and Jack Benny) snubbed by Elmer Fudd in What’s Up, Doc? (Bob McKimson, 1950). In Farm Frolics (Bob Clampett, 1941), a horse, asked by the narrator to "do a canter", promptly launches into a singing, dancing, eye-rolling impression. The Cantor gag that got the most mileage, however, was his oft-repeated wish for a son after five famous daughters. Slap-Happy Pappy (Clampett, 1940) features an "Eddie Cackler" rooster that wants a boy, to little avail. Other references can be found in Baby Bottleneck (Clampett, 1946) and Circus Today (Tex Avery, 1940). In Merrie Melodies, The Coo-Coo Nut Grove Cantor's many daughters are referenced by a group of singing quintuplet girls. In Porky’s Naughty Nephew (Clampett, 1938) a swimming Cantor gleefully adopts a "buoy". An animated Cantor also appears prominently in Walt Disney's "Mother Goose Goes Hollywood" (Wilfred Jackson, 1938) as Little Jack Horner, who sings "Sing a Song of Sixpence".

Beginning with I Like Mountain Music (1933), other animated Cantor cameos include Shuffle Off to Buffalo (Harman-Ising, 1933) and Billboard Frolics (Friz Freleng, 1935)

Question: How long is the river along which the Polanie remained in situ? Passage:The Poles are the most numerous of the West Slavs and occupy what some believe to be the original homeland of the Slavic peoples. While other groups migrated, the Polanie remained in situ along the Vistula, from the river's sources to its estuary at the Baltic Sea. There is no other European nation centred to such an extent on one river. The establishment of a Polish state is often identified with the adoption of Christianity by Mieszko I in 966 CE (see Baptism of Poland), when the state covered territory similar to that of present-day Poland. In 1025 CE, Poland became a kingdom. In 1569, Poland cemented a long association with the Grand Duchy of Lithuania by signing the Union of Lublin, forming the Polish–Lithuanian Commonwealth. The Polish–Lithuanian Commonwealth was one of the largest and most populous countries in 16th- and 17th-century Europe.

While other groups migrated, the Polanie remained in situ along the Vistula, from the river's sources to its estuary at the Baltic Sea

Question: Which city was larger the year Denzio was born, Prague, Dresden, or Leipzig? Passage:Antonio Denzio (23 September 1689 – after 1763) was an Italian impresario, tenor, and librettist. Born in Venice to a family of musicians and operatic personnel, he pursued a career mainly as a singer until 1724, when he traveled to Bohemia as a member of the opera company of Antonio Maria Peruzzi, probably his uncle. Peruzzi had the idea of bringing an Italian opera company to central Europe to perform first in Prague, then Dresden and Leipzig. The company was first brought to Bohemia under the patronage of Count Franz Anton von Sporck, who had it play at his palace at Kuks in northwest Bohemia in the summer of 1724. The performances were so successful that he permitted the company to perform free of charge in his palace in Prague. After disagreements with Peruzzi, Denzio was able to supplant him as impresario before the end of the year 1724 and continued productions in the Sporck palace until 1735. Peruzzi left with some of the Peruzzi-Denzio players to found the Breslau Opera. Denzio's opera theater at Sporck's palace was the first standing opera theater in the city. His productions were popular with the Bohemian nobility until about 1729, after which Denzio's finances deteriorated. Count Sporck provided no financial assistance to the company except the free use of his theater, and he allowed it to fail. The company went bankrupt and Denzio was forced to spend time in debtors' prison. During its heyday, Denzio was able to attract at least one of the principal singing stars in Italy to Prague each season. The most prominent of all was Margherita Gualandi, who was forced to come to Prague after being blackballed in Italy for bad behavior. Denzio sought the assistance of Antonio Vivaldi in engaging singers for his company, and the composer sent music. In the early 1730s, Vivaldi came himself to Prague. Some of the music for one of his operas composed for Prague, Argippo, has only recently been re-discovered.


Antonio Denzio (23 September 1689 – after 1763) was an Italian impresario, tenor, and librettist