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 (", ").

Paragraph- Sent 1: Energy is the ability to do work.
Sent 2: Another way to say this is, the ability to cause change.
Sent 3: Work is done when a force is used to move something.
Sent 4: When work is done, energy is transferred.
Sent 5: This transfer occurs between one object and another.
Sent 6: For example, a batter swings a bat and transfers energy.
Sent 7: She transfers her energy to the bat.
Sent 8: The moving bat, in turn, transfers energy to the ball.
Sent 9: Energy is measured in the Joule (J).
Sent 10: Energy exists in many forms.
Sent 11: One form of energy is called mechanical.
Sent 12: Mechanical energy is the energy of motion.
Sent 13: This type of energy can also include things that are not yet in motion.
Sent 14: In these cases, they have only a potential to be in motion.
Sent 15: In most cases, this ability comes from a position.
Sent 16: A rock sitting on top of a cliff has potential energy.
Sent 17: It is more than just the ability.
Sent 18: A rock sitting on the ground could move if someone picked it up.
Question: What kind of energy is mechanical energy?.
11, 12.

Paragraph- Sent 1: Juzo Murasaki arrives at a work construction area to take on his new job as a construction worker .
Sent 2: To his quiet dismay , his supervising boss turns out to be Toru Akai , who with his gang had made Juzo 's middle school life a living hell .
Sent 3: Akai , however , does n't recognize Juzo .
Sent 4: Juzo 's more disconcerted when he discovers that Akai lives with his wife , Nozomi Akai and their toddler son above Juzo 's new apartment .
Sent 5: As Juzo emotionally struggles to handle these unexpected developments , a mysterious and seemingly malicious hooded figure appears .
Sent 6: It calls itself Number 13 .
Sent 7: As Juzo attempts to control increasing number of flashbacks and a spiral fall into psychological darkness , Akai constantly picks on Juzo and other work colleagues including Seki Hajime , a former middle school student who becomes Juzo 's casual friend in spite of Juzo 's anti-social tendencies , at work .
Sent 8: Meanwhile Akai 's wife , Nozomi , attempts to make friends with Juzo and entrusting the care of her toddler son to Juzo .
Sent 9: She proudly shows Juzo her husband 's school photos .
Sent 10: In one class photo , Juzo 's space is marked with an X to show he was absent .
Sent 11: Juzo suffers a severe flashback to explain his absence that day : in their school 's science room , Akai and his friends have thrown acid at Juzo 's face .
Sent 12: Seki becomes suspicious about Juzo 's increasingly odd behavior and goes to inform Arai at the work site , but Arai dismisses him without giving him a chance to speak .
Sent 13: During this incident , Seki does n't realize he 's being watched by Number 13 , but as soon as he does , Number 13 kills him .
Question: What relationship does Akai's wife, Nozomi, have with Juzo?.
4, 8, 9.

Paragraph- Sent 1: WASHINGTON (CNN) -- The U.S. Food and Drug Administration announced Wednesday that laboratory tests on popular smoking devices known as electronic cigarettes have found they contain carcinogens and other toxic chemicals dangerous to humans.
Sent 2: E-cigarettes are battery-operated and contain cartridges filled with nicotine and other chemicals.
Sent 3: Known as "e-cigarettes," the devices are battery-operated and contain cartridges filled with nicotine and other chemicals, spiced with flavors such as chocolate, cola or bubble gum.
Sent 4: While manufacturers tout e-cigarettes as a "healthy way" to smoke, federal health officials say the devices turn nicotine, which is highly addictive, and other chemicals into a vapor that is inhaled by the user.
Sent 5: "The FDA is concerned about the safety of these products and how they are marketed to the public," said Dr. Margaret A. Hamburg, commissioner of the FDA.
Sent 6: CNN contacted Florida-based Smoking Everywhere, one of the largest manufacturers of e-cigarettes, after the FDA announcement, and a spokeswoman said the company had no comment.
Sent 7: Because e-cigarettes have not been submitted to the FDA for evaluation or approval, the agency had no way of knowing the levels of nicotine or the amounts or kinds of other chemicals that the various brands of these products deliver to the user.
Sent 8: That is why the FDA began to test them.
Sent 9: The FDA's Division of Pharmaceutical Analysis analyzed the ingredients in a small sample of cartridges from two leading brands of e-cigarettes.
Sent 10: In releasing its information, the FDA did not identify the two companies, but said in one sample, diethylene glycol -- a chemical used in antifreeze that is toxic to humans -- was detected.
Sent 11: Other samples detected carcinogens that are dangerous to those who smoke them, the FDA said.
Sent 12: The FDA has been examining and seizing shipments of non-U.S.-made e-cigarettes at the U.S. border since summer 2008.
Sent 13: To date, 50 shipments have been stopped.
Sent 14: The products examined thus far meet the definition of a combination drug-device product under the Federal Food, Drug, and Cosmetic Act.
Sent 15: "We know very little about these devices, said Dr. Jonathan Samet, director of the Institute for Global Health at the University of Southern California, "but to say they are healthy -- that's highly doubtful.".
Question: What did the FDA find in the e-cigarette samples that were tested?.
1, 10, 11.