Instructions: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Input: Question: How old was Robert Guiscard when he defeated the papal troops of Pope Leo IX? Passage 1:The movement of Protestant Reformation, led by Martin Luther in the Holy Roman Empire and John Calvin in France, had an important impact on music in Paris. Under Calvin's direction, between 1545 and 1550 books of psalms were translated from Latin into French, turned into songs, and sung at reformed services in Paris. The Catholic establishment reacted fiercely to the new movement; the songs were condemned by the College of Sorbonne, the fortress of orthodoxy, and in 1549 one Protestant tailor in Paris, Jacques Duval, was burned at the stake, along with his song book. When the campaign against the new songs proved ineffective, the Catholic Church, at the Council of Trent (1545-1563) which launched the Counter-Reformation, also launched a musical counter-reformation. It was calling for an end to complex but unintelligible chants, simpler melodies, and more serious and elevated lyrics.
Passage 2:San Severo lies on the Daunia, and various Neolithic settlements have been detected. In the early Middle Ages, the area was not inhabited or defined. Between the Lombards and the Byzantine ages, the Benedictine monastery at Cassino was established, and with it, the cult of the apostle of Saint Severinus of Noricum. San Severo was founded in the 11th century around a small church built by the Benedictine monks from Montecassino. It rapidly developed as a trade town. In 1053, it was the scene of the historical victory of Robert Guiscard over the papal troops under Pope Leo IX (see Battle of Civitate). In the eleventh century, San Severo was the route of the Via Sacra Langobardorum and a primitive church arose dedicated to Saint Severino, from which continued an influx of pilgrims to Monte Sant'Angelo and movement of people and goods. The town was therefore called Castellum Sancti Severini ("Fortified Town of San Severo").
Passage 3:Parkinson divorced in 1952 and he married the writer and journalist Ann Fry (19211983), with whom he had two sons and a daughter. In 1958, while still in Singapore, he published his most famous work, Parkinson's Law, which expanded upon a humorous article that he had published in the Economist magazine in November 1955, satirising government bureaucracies. The 120-page book of short studies, published in the United States and then in Britain, was illustrated by Osbert Lancaster and became an instant best seller. It explained the inevitability of bureaucratic expansion, arguing that 'work expands to fill the time available for its completion'. Typical of his satire and cynical humour, it included a discourse on Parkinson's Law of Triviality (debates about expenses for a nuclear plant, a bicycle shed, and refreshments), a note on why driving on the left side of the road (see road transport) is natural, and suggested that the Royal Navy would eventually have more admirals than ships. After serving as visiting professor at Harvard University in 1958, the University of Illinois and the University of California, Berkeley in 195960, he resigned his post in Singapore to become an independent writer. To avoid high taxation in Britain, he moved to the Channel Islands and settled at St Martin's, Guernsey, where he purchased Les Caches Hall and later restored Annesville Manor. His writings from this period included a series of historical novels featuring a fictional naval officer from Guernsey, Richard Delancey, during the Napoleonic era.

Output:
2