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 (", ").
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Question: 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?.

Answer: 11, 12.

Question: Paragraph- Sent 1: What happens when a diver jumps off the diving board?
Sent 2: His gravitational potential energy changes to kinetic energy as he falls.
Sent 3: In other words, he falls faster and faster until reaching the water.
Sent 4: However, he can always regain his potential energy.
Sent 5: All he must do is get out of the water and climb back up.
Sent 6: This requires an input of kinetic energy.
Sent 7: These changes in energy are examples of energy conversion.
Sent 8: Energy can be converted from one form to another.
Sent 9: It can also be transferred from one object to another.
Sent 10: Think back to the leaf example.
Sent 11: The leaf was hanging from a branch.
Sent 12: At this time, it had gravitational potential energy.
Sent 13: As it came loose from the branch, gravity pulled it toward the ground.
Sent 14: The leaf started to fall, or move, toward the ground.
Sent 15: Its potential energy was changed into motion.
Sent 16: As it landed on the ground, it stopped moving.
Sent 17: As it lays on the ground, it has no potential to move.
Sent 18: If it does move it is because something else transferred energy to it.
Question: What are examples of energy conversion?.

Answer: 2, 4, 5, 6, 7.

Question: Paragraph- Sent 1: As a husband, father and tenant of a Grand Rapids public housing complex, Aubrey Robertson puts security at the top of his home priority list.
Sent 2: Because of that, Robertson is all for a zero-tolerance drug law in force at Creston Plaza apartments on Grand Rapids' Northeast Side.
Sent 3: That includes cases in which families may be evicted for the drug use of a single family member, even off the premises.
Sent 4: Robertson sees it as a tool to keep his complex as clean and safe as possible.
Sent 5: "If there's one person (using drugs), that is a start," said Robertson, 52, a native of Jamaica.
Sent 6: He has lived the past four years at Creston Plaza with his wife, Tammy, and his daughter, Precious, 3.
Sent 7: In recent months, Robertson was pleased to see casual drug use at the complex diminish with the installation of security cameras.
Sent 8: "If there is a start, then there will be some other problem.
Sent 9: I totally agree (if there is a drug link), get them out."Sent 10: Critics say the law -- argued Tuesday before the U.S. Supreme Court -- tramples on individual rights and harms the very people public housing authorities are supposed to help.
Sent 11: "It's basically one strike and you're out, and I think they went beyond what Congress intended," said Michael Chielens, executive director of Western Michigan Legal Services.
Sent 12: "Someone who had no knowledge or involvement in a criminal act is being punished.
Sent 13: That's kind of a basic due process notion that we have had in our legal tradition for a long time."Sent 14: The case was brought by four Oakland, Calif., senior citizens, including 63-year-old great-grandmother Pearlie Rucker.
Sent 15: They received eviction notices because of the drug use of relatives or caregivers.
Sent 16: Rucker was ordered out because her mentally disabled daughter was caught with cocaine three blocks from the apartment she shared with her mother and other family members, court records show.
Sent 17: An appeals court blocked enforcement of the law.
Sent 18: At issue is whether housing directors are being more aggressive than Congress intended.
Question: In what way might Congress' intent to keep public housing safe, be mismanaged by those in charge of the housing complexes?.

Answer:
10.