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 (", ").
One example is below.
Q: 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?.
A: 1, 2.
Rationale: 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.
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: What is the aim of this years theme "Earth"?.
A:
4, 5.