You are given a paragraph, with numbered sentences, and a question. Write the numbers of the sentences needed to answer the given question. Separate multiple sentence numbers with a comma (", "). E.g. "1, 2" would be the correct response if Sent 1 and Sent 2 are needed to answer the given question (do not include sentences that contain no information that is necessary to answer the question). Sort the sentence numbers in an increasing order (i.e., '1, 2', instead of '2, 1'). Your answer should not contain anything than the sentence numbers separated by a comma (e.g. '1, 2, 3, 4'). The given question requires more than one sentence to answer. So, your answer must contain at least one comma (", ").

Ex Input:
Paragraph- Sent 1: (CNN) -- In November 2009, Norwegian freelance journalist Paul Refsdal is riding in a pick-up truck on a dusty track of Afghan road.
Sent 2: The Taliban have kidnapped him.
Sent 3: If the truck turns right, he knows he's being sold to another militant group.
Sent 4: A left turn means his kidnappers have decided to let him go.
Sent 5: His journey started when Refsdal, who wanted to document the daily lives of the Taliban, accepted the invitation of a Taliban commander to film him and his fighters.
Sent 6: Refsdal later accompanied another Taliban commander, Omar, to his hideout on a second embed.
Sent 7: As part of CNN's "Taliban" documentary, Refsdal talked with CNN's Anderson Cooper about going from invited guest to kidnap victim -- a harrowing experience that began the way it later ended, with Refsdal in a truck.
Sent 8: Here is an edited excerpt: REFSDAL: We rent a pickup truck and we drive into this valley that doesn't really have a road.
Sent 9: I'm told it is not possible to drive anymore.
Sent 10: We will have to walk for several hours up the hillside to one village, and we have to sneak a little bit.
Sent 11: Omar is very particular about I should cover my face.
Sent 12: I assume this is because they don't want informers to see that there's a foreigner coming.
Sent 13: And we sleep in a house, and everything seems OK. Then, the next day we are asked to go to another house, just 100 meters down the hillside.
Sent 14: We have to wait there, because they're going to have a meeting.
Sent 15: After a couple hours, one of the fighters comes and says he's from al Qaeda.
Sent 16: And he says that he has information that I was spying for the coalition, so both my translator and I will be executed tonight.
Sent 17: And he goes on, saying that we're going to be killed with a knife.
Sent 18: ... He explains how much he hates foreigners and he wants to eat the flesh of foreigners.
Question: What happened to Paul Refsdal in November 2009.

Ex Output:
1, 2.

Ex Input:
Paragraph- Sent 1: As Philip marched south, his opponents blocked him near Chaeronea, Boeotia.
Sent 2: During the ensuing Battle of Chaeronea, Philip commanded the right wing and Alexander the left, accompanied by a group of Philip's trusted generals.
Sent 3: According to the ancient sources, the two sides fought bitterly for some time.
Sent 4: Philip deliberately commanded his troops to retreat, counting on the untested Athenian hoplites to follow, thus breaking their line.
Sent 5: Alexander was the first to break the Theban lines, followed by Philip's generals.
Sent 6: Having damaged the enemy's cohesion, Philip ordered his troops to press forward and quickly routed them.
Sent 7: With the Athenians lost, the Thebans were surrounded.
Sent 8: Left to fight alone, they were defeated.
Sent 9: After the victory at Chaeronea, Philip and Alexander marched unopposed into the Peloponnese, welcomed by all cities; however, when they reached Sparta, they were refused, but did not resort to war.
Sent 10: At Corinth, Philip established a "Hellenic Alliance" (modeled on the old anti-Persian alliance of the Greco-Persian Wars), which included most Greek city-states except Sparta.
Sent 11: Philip was then named Hegemon (often translated as "Supreme Commander") of this league (known by modern scholars as the League of Corinth), and announced his plans to attack the Persian Empire.
Question: What were the two groups that Philip and Alexander fought against?.

Ex Output:
4, 5, 7.

Ex Input:
Paragraph- Sent 1: New Legitimacy: Organized crime was soon to have a formidable adversary in its bid to control Las Vegascorporate cash.
Sent 2: Though Las Vegas had developed a powerful local economy, few major outside investments were made in the city, due primarily to mob infiltration and its inherent ties to illegal activities.
Sent 3: That would change dramatically with the 1966 arrival of billionaire Howard Hughes.
Sent 4: A legitimate businessman, Hughes was nonetheless eccentric and dramatic, a style suited to the Las Vegas ethos.
Sent 5: True to the myth, the reclusive Hughes immediately cloistered himself in the Desert Inn's penthouse.
Sent 6: Several weeks later he was askedthen orderedto vacate the room to make room for high rollers, whereupon he promptly bought the property and fired the management.
Sent 7: Thus began Hughes' legendary three-year, $300-million Las Vegas buying spree.
Sent 8: When it was over, Hughes owned six casinos, an airport, and an airline, along with numerous plots of land stretching from the Strip to the mountains.
Sent 9: Hughes' actions would have beneficial repercussions, both immediate and lasting.
Sent 10: Because of the new legitimacy Las Vegas acquired from Hughes' investments, established companies such as Hilton Hotels bought into the gaming business, and their influence helped draw a line in the desert sand between legitimate operations and mob casinos, where illegal skimming of profits was rampant.
Sent 11: That, combined with the formation of the Nevada Gaming Control Board, would signal the beginning of the end for heavy mob influence in the city.
Sent 12: Las Vegas with a Vision As corporations moved in and the mob was slowly pushed out, a new Las Vegas emerged.
Sent 13: The legitimization of gambling led to its increased legalization across the US.
Sent 14: What was once a sure thing became much more competitive.
Sent 15: Casino operators had to reassess the nature of their business.
Sent 16: The first to really do so was Steve Wynn, a Las Vegas resident and owner of the Golden Nugget.
Sent 17: In the mid-1980s, Wynn began plans to reinvigorate Las Vegas with a new resort.
Sent 18: He bought several Strip propertiesthe Silver Slipper and Castaways among themand demolished them to make way for a new kind of resortMirage which became an instant success.
Question: What did Hughes buy in his three year buying spree?.

Ex Output:
7, 8.