Detailed Instructions: 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 (", ").
See one example below:
Problem: Paragraph- Sent 1: A Republican bid to keep the government open past Friday includes no new money for the construction of a border wall along the U.S.-Mexico border, according to several congressional aides familiar with ongoing talks.
Sent 2: GOP leaders submitted the new offer Tuesday afternoon in an effort to appease Democrats, whose votes are needed to avert a shutdown of federal agencies, several House and Senate aides said.
Sent 3: However, Republicans also insisted on increases in border security and defense spending, including money to repair existing fencing and new surveillance technology to patrol the nearly 2,000-mile border.
Sent 4: Democrats have indicated that they would support such appropriations so long as no money goes toward an actual wall.
Question: Who has to be appeased to keep the government open?.
Solution: 1, 2.
Explanation: The question is: Who has to be appeased to keep the government open? The phrase "appease Democrats" is mentioned in Sent 2, about accepting offer that is mentioned in Sent 1 to "keep the government open". So, Sent 1 and Sent 2 are the sentences needed to answer this question.

Problem: Paragraph- Sent 1: Our only sources for what intelligence officials thought at the time are what they said in informal briefings.
Sent 2: Soon after the Cole attack and for the remainder of the Clinton administration, analysts stopped distributing written reports about who was responsible.
Sent 3: The topic was obviously sensitive, and both Ambassador Bodine in Yemen and CIA analysts in Washington presumed that the government did not want reports circulating around the agencies that might become public, impeding law enforcement actions or backing the President into a corner.
Sent 4: Instead the White House and other principals relied on informal updates as more evidence came in.
Sent 5: Though Clarke worried that the CIA might be equivocating in assigning responsibility to al Qaeda, he wrote Berger on November 7 that the analysts had described their case by saying that "it has web feet, flies, and quacks."Sent 6: On November 10, CIA analysts briefed the Small Group of principals on their preliminary findings that the attack was carried out by a cell of Yemeni residents with some ties to the transnational mujahideen network.
Sent 7: According to the briefing, these residents likely had some support from al Qaeda.
Sent 8: But the information on outside sponsorship, support, and direction of the operation was inconclusive.
Sent 9: The next day, Berger and Clarke told President Clinton that while the investigation was continuing, it was becoming increasingly clear that al Qaeda had planned and directed the bombing.
Sent 10: In mid-November, as the evidence of al Qaeda involvement mounted, Berger asked General Shelton to reevaluate military plans to act quickly against Bin Ladin.
Sent 11: General Shelton tasked General Tommy Franks, the new commander of CENTCOM, to look again at the options.
Sent 12: Shelton wanted to demonstrate that the military was imaginative and knowledgeable enough to move on an array of options, and to show the complexity of the operations.
Sent 13: He briefed Berger on the "Infinite Resolve" strike options developed since 1998, which the Joint Staff and CENTCOM had refined during the summer into a list of 13 possibilities or combinations.
Sent 14: CENTCOM added a new "phased campaign"concept for wider-ranging strikes, including attacks against the Taliban.
Sent 15: For the first time, these strikes envisioned an air campaign against Afghanistan of indefinite duration.
Sent 16: Military planners did not include contingency planning for an invasion of Afghanistan.
Sent 17: The concept was briefed to Deputy National Security Advisor Donald Kerrick on December 20, and to other officials.
Sent 18: On November 25, Berger and Clarke wrote President Clinton that although the FBI and CIA investigations had not reached a formal conclusion, they believed the investigations would soon conclude that the attack had been carried out by a large cell whose senior members belonged to al Qaeda. 
Question: Who briefed Berger on the "Infinite Resolve"?.
Solution:
11, 13.