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 (", ").

Input: Consider Input: Paragraph- Sent 1: The bar was manned by an expensive humanoid robot.
Sent 2: It turned toward Sarah's wave and acknowledged her with a nod, moments later setting a fluted glass of sparkling liquid in front of her.
Sent 3: I marveled at the robot's smoothness and coordination.
Sent 4: Clearly, it was a high-end model.
Sent 5: Sarah transferred the glass to my free hand and pulled me away from the bar for more introductions, with Alexis trailing after us.
Sent 6: I spent the evening listening, mostly.
Sent 7: Listening and stuffing my face with all the bits of fine food provided.
Sent 8: No one minded; Sarah's inner circle was content to fill our circle of couches with plenty of chatter.
Sent 9: Ray, a plump man who was grey where he wasn't bald.
Sent 10: Zheng, short and dark and lean, with a very intense gaze.
Sent 11: He made me a little uncomfortable.
Sent 12: Kishori, petite, her hair strung out in a series of braids that reached nearly to her waist.
Sent 13: I categorized them based on their appearances, hoping I'd be able to pick them out of the crowd again later.
Sent 14: Most of their chatter was meaningless to mestories of day-to-day activities, how so-and-so had been seen in so-and-so's table at lunch and my wasn't that a surprise, and why hadn't the chef concocted this delectable a selection of appetizers for the dance the other night, but of course those rolled meat pastries reminded one of the pastries back on Earth, didn't they, and this was somehow an interesting fact.
Sent 15: After the first half-hour, I stopped expending effort to keep names and stories and gossip straight.
Sent 16: I wasn't learning anything useful.
Sent 17: I could have started asking questions, but I wanted to get my bearings first.
Sent 18: Tonight was for observation.
Sent 19: I didn't bother trying to seek out a different group of potentially more interesting people, though.
Sent 20: They all looked the same: clusters of social butterflies surrounded by the less apt, the hangers-on, the circle with whom the gossip was shared.
Question: What clues do we have that the speaker is there to get information?.

Output: 6, 13, 16, 17.

Input: Consider 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.

Output: 1, 2.

Input: Consider Input: Paragraph- Sent 1: A flood occurs when a river overflows its banks.
Sent 2: This might happen because of heavy rains.
Sent 3: Floodplains In very flat regions, flood water may spread out on the surface of the land.
Sent 4: It then slows down and drops its sediment.
Sent 5: If a river floods often, a floodplain develops.
Sent 6: A floodplain is an area where a thick layer of rich soil is left behind as the floodwater recedes.
Sent 7: Thats why floodplains are usually good places for growing plants.
Sent 8: They are very flat areas and they have very rich soils.
Sent 9: The Nile River valley is a great example of a floodplain.
Sent 10: Each year, the Nile River rises over its banks.
Sent 11: This floodwater carries a lot of sediment.
Sent 12: This sediment has been eroded off areas of land from upstream.
Sent 13: This sediment is dropped as the water slows down after spreading across the land.
Sent 14: What is left behind is a very rich soil.
Sent 15: Thats why crops can be raised in the middle of a sandy desert.
Sent 16: Natural Levees A flooding river often forms natural levees along its banks.
Sent 17: A levee is a raised strip of sediments deposited close to the waters edge.
Question: If a river floods often, in what type of region might a floodplain develop?.
Output: 3, 5.