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 Q]: Paragraph- Sent 1: Brad, Texas (CNN) -- Authorities were working on plans Friday for residents who were forced to flee a wildfire in northern Texas to return home, a day after firefighters made progress battling the blaze that destroyed dozens of homes.
Sent 2: The blaze in Palo Pinto County scorched 6,200 acres by Thursday, according to the Texas Forest Service.
Sent 3: The fire is burning near the resort of Possum Kingdom Lake, near the town of Brad, about 100 miles west of Dallas.
Sent 4: "We feel much better about this fire today," as the blaze is now 50% contained, said John Nichols, a spokesman for the Forest Service.
Sent 5: He said evacuations were lifted for some residents forced to evacuate the fire, which was driven by high temperatures and dry winds.
Sent 6: The wildfire has destroyed 40 homes and nine RVs since it began Tuesday, the Forest Service said Thursday.
Sent 7: Firefighters were receiving support from aerial tankers and helicopters.
Sent 8: Authorities are mapping out plans to allow residents to return to their homes, said Palo Pinto County Sheriff Ira Mercer.
Sent 9: Authorities also are trying to open the lake for the Labor Day holiday, he said.
Sent 10: On Wednesday, evacuations were ordered in several communities on the north side of the lake after the fire charged over a ridge and approached a dam on the lake, CNN affiliate WFAA reported.
Sent 11: The wildfire was moving so fast that the Forest Service pulled out of its command observation post, telling journalists and onlookers to get out of the way of the fire.
Sent 12: "My house is right through here, though it may be gone," Tom Hardeston told WFAA as he watched the fire.
Sent 13: Nearby ranchers battled to save their herds from the encroaching fire.
Sent 14: "I'm just moving them from pasture to pasture," Cindi McCoy told WFAA, referring to her livestock.
Sent 15: "As one pasture burns, I'm moving them back to that one and bring(ing) them back around.".
Question: When was the blaze 50 percent contained?.
[EX A]: 1, 4.

[EX Q]: Paragraph- Sent 1: LONDON, England (CNN) -- Last year's inaugural Prix Pictet photography award for environmental sustainability produced a stunning shortlist of photos.
Sent 2: Ed Kashi has documented the impact oil has made on the Niger Delta in Africa.
Sent 3: This year is no different with 12 photographers in the running for the first prize of 100,000 CHF ($97,500).
Sent 4: The theme in 2009 is described simply as "Earth."Sent 5: The aim is to highlight how man exploits the planet's resources and how this impacts the landscapes and communities surrounding them.
Sent 6: In an extraordinary series of photos Canadian Christopher Anderson captures how the quest for raw materials affects Venezuela.
Sent 7: In "The Diminishing Present," Portuguese-born Edgar Martins records forest landscapes in the moments before they are engulfed by flames.
Sent 8: In "Curse of the Black Gold: 50 Years of Oil in the Niger Delta," Ed Kashi captures the impact of the oil industry on Nigeria's environment and people since it was first discovered five decades ago.
Sent 9: Kashi, an American photojournalist, spent three years compiling his photos of the Niger Delta, making a total of five trips to the troubled region.
Sent 10: Kashi told CNN: "It was truly one of the most graphic examples of economic inequity that I have ever seen.
Sent 11: Especially with the backdrop of hundreds of billions of oil wealth that has been generated over the previous 50 years."Sent 12: As a result of his work, Kashi says that his photos are now being used by universities and NGOs to raise awareness to try and effect change.
Sent 13: To him, this has been one of the most gratifying and exciting by-products of his work.
Question: Why is Kashi so happy about the by-products of his work?.
[EX A]: 12, 13.

[EX Q]: Paragraph- Sent 1: Zinni feared that Bin Ladin would in the future locate himself in cities, where U.S. missiles could kill thousands of Afghans.
Sent 2: He worried also lest Pakistani authorities not get adequate warning, think the missiles came from India, RESPONSES TO AL QAEDA'S INITIAL ASSAULTS 135 and do something that everyone would later regret.
Sent 3: Discussing potential repercussions in the region of his military responsibility, Zinni said, "It was easy to take the shot from Washington and walk away from it.
Sent 4: We had to live there."Sent 5: Zinni's distinct preference would have been to build up counterterrorism capabilities in neighboring countries such as Uzbekistan.
Sent 6: But he told us that he could not drum up much interest in or money for such a purpose from Washington, partly, he thought, because these countries had dictatorial governments.
Sent 7: After the decision-in which fear of collateral damage was an important factor- not to use cruise missiles against Kandahar in December 1998, Shelton and officers in the Pentagon developed plans for using an AC-130 gunship instead of cruise missile strikes.
Sent 8: Designed specifically for the special forces, the version of the AC-130 known as "Spooky"can fly in fast or from high altitude, undetected by radar; guided to its zone by extraordinarily complex electronics, it is capable of rapidly firing precision-guided 25, 40, and 105 mm projectiles.
Sent 9: Because this system could target more precisely than a salvo of cruise missiles, it had a much lower risk of causing collateral damage.
Sent 10: After giving Clarke a briefing and being encouraged to proceed, Shelton formally directed Zinni and General Peter Schoomaker, who headed the Special Operations Command, to develop plans for an AC-130 mission against Bin Ladin's headquarters and infrastructure in Afghanistan.
Sent 11: The Joint Staff prepared a decision paper for deployment of the Special Operations aircraft.
Sent 12: Though Berger and Clarke continued to indicate interest in this option, the AC-130s were never deployed.
Sent 13: Clarke wrote at the time that Zinni opposed their use, and John Maher, the Joint Staff 's deputy director of operations, agreed that this was Zinni's position.
Sent 14: Zinni himself does not recall blocking the option.
Sent 15: He told us that he understood the Special Operations Command had never thought the intelligence good enough to justify actually moving AC-130s into position.
Sent 16: Schoomaker says, on the contrary, that he thought the AC-130 option feasible.
Sent 17: The most likely explanation for the two generals' differing recollections is that both of them thought serious preparation for any such operations would require a long-term redeployment of Special Operations forces to the Middle East or South Asia.
Sent 18: The AC-130s would need bases because the aircraft's unrefueled range was only a little over 2,000 miles.
Question: Why were the AC 130's never deployed?.
[EX A]:
12, 13.