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 (", ").
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Question: 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: Why did Refsdal walk for several hours up a hillside on his way to meet the Taliban fighters?.

Answer: 8, 9, 10.

Question: Paragraph- Sent 1: Alexander began his reign by eliminating potential rivals to the throne.
Sent 2: He had his cousin, the former Amyntas IV, executed.
Sent 3: He also had two Macedonian princes from the region of Lyncestis killed, but spared a third, Alexander Lyncestes.
Sent 4: Olympias had Cleopatra Eurydice and Europa, her daughter by Philip, burned alive.
Sent 5: When Alexander learned about this, he was furious.
Sent 6: Alexander also ordered the murder of Attalus, who was in command of the advance guard of the army in Asia Minor and Cleopatra's uncle.
Sent 7: Attalus was at that time corresponding with Demosthenes, regarding the possibility of defecting to Athens.
Sent 8: Attalus also had severely insulted Alexander, and following Cleopatra's murder, Alexander may have considered him too dangerous to leave alive.
Sent 9: Alexander spared Arrhidaeus, who was by all accounts mentally disabled, possibly as a result of poisoning by Olympias.
Sent 10: News of Philip's death roused many states into revolt, including Thebes, Athens, Thessaly, and the Thracian tribes north of Macedon.
Sent 11: When news of the revolts reached Alexander, he responded quickly.
Sent 12: Though advised to use diplomacy, Alexander mustered 3,000 Macedonian cavalry and rode south towards Thessaly.
Sent 13: He found the Thessalian army occupying the pass between Mount Olympus and Mount Ossa, and ordered his men to ride over Mount Ossa.
Sent 14: When the Thessalians awoke the next day, they found Alexander in their rear and promptly surrendered, adding their cavalry to Alexander's force.
Sent 15: He then continued south towards the Peloponnese.
Sent 16: Alexander stopped at Thermopylae, where he was recognized as the leader of the Amphictyonic League before heading south to Corinth.
Sent 17: Athens sued for peace and Alexander pardoned the rebels.
Sent 18: The famous encounter between Alexander and Diogenes the Cynic occurred during Alexander's stay in Corinth.
Question: What did Alexander learn that made him furious?.

Answer: 4, 5.

Question: Paragraph- Sent 1: You just got done with a long run.
Sent 2: You are gasping for air.
Sent 3: Why does your body react this way?
Sent 4: What is the purpose of breathing?
Sent 5: All the cells of your body need oxygen to work properly.
Sent 6: Your bodys circulatory system works with the respiratory system to deliver the oxygen.
Sent 7: Your blood carries red blood cells.
Sent 8: The main job of red blood cells is to carry oxygen throughout your body.
Sent 9: The red blood cells get oxygen in the lungs.
Sent 10: The lungs are the main organs of the respiratory system.
Sent 11: The respiratory system is the body system that takes in oxygen.
Sent 12: It then releases carbon dioxide back to the atmosphere.
Sent 13: The carbon dioxide is the waste material from the cells.
Question: What cells carry oxygen to the lungs?.

Answer:
7, 8, 9.