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: The one person who, by his interference, could have settled all doubts was debarred by circumstances from interfering in the matter.
Sent 2: Wykham Delandre had quarrelled with his sister--or perhaps it was that she had quarrelled with him--and they were on terms not merely of armed neutrality but of bitter hatred.
Sent 3: The quarrel had been antecedent to Margaret going to Brent's Rock.
Sent 4: She and Wykham had almost come to blows.
Sent 5: There had certainly been threats on one side and on the other; and in the end Wykham, overcome with passion, had ordered his sister to leave his house.
Sent 6: She had risen straightway, and, without waiting to pack up even her own personal belongings, had walked out of the house.
Sent 7: On the threshold she had paused for a moment to hurl a bitter threat at Wykham that he would rue in shame and despair to the last hour of his life his act of that day.
Sent 8: Some weeks had since passed; and it was understood in the neighbourhood that Margaret had gone to London, when she suddenly appeared driving out with Geoffrey Brent, and the entire neighbourhood knew before nightfall that she had taken up her abode at the Rock.
Sent 9: It was no subject of surprise that Brent had come back unexpectedly, for such was his usual custom.
Sent 10: Even his own servants never knew when to expect him, for there was a private door, of which he alone had the key, by which he sometimes entered without anyone in the house being aware of his coming.
Sent 11: This was his usual method of appearing after a long absence.
Question: What happened before Margaret went to Geoffrey's house?.
2, 3, 8.

Paragraph- Sent 1: Have you ever felt a shock?
Sent 2: Maybe you had just walked across the carpet and touched something metal?
Sent 3: How is this similar to lightning?
Sent 4: Believe it or not, they are very similar.
Sent 5: They are both discharges of static electricity.
Sent 6: Lightning is static electricity on a grand scale.
Sent 7: Lightning discharges a lot of electric charge.
Sent 8: It happens all at once.
Sent 9: Unfortunately, this large discharge is not useful.
Sent 10: It is so large and so fast, it cannot be controlled.
Sent 11: You cant plug a toaster into a lightning bolt!
Sent 12: For most devices, a much smaller amount of electric charge is needed.
Sent 13: It must also be steady.
Sent 14: It cant come all in one big jolt.
Sent 15: Thats why we cant run our homes off of lightning.
Sent 16: Our homes need to have a steady and continuous supply of electric current.
Question: What can happen when you walk across a carpeted floor and touch metal?.
1, 2.

Paragraph- Sent 1: You approach the door of a friend.
Sent 2: What is the first thing you do?
Sent 3: Of course, you wipe your feet.
Sent 4: You are a thoughtful visitor.
Sent 5: Fortunately, there is a piece of carpet to wipe your shoes.
Sent 6: Too bad your caring comes at a price.
Sent 7: You now reach out to touch the brass knocker on the door.
Sent 8: A spark appears between you and the door.
Sent 9: You feel an electric shock.
Sent 10: Why do you think this happened?
Sent 11: Where did the electricity come from?This was a discharge of static electricity.
Sent 12: Has this ever happened to you?
Sent 13: Why do you think you felt a shock?
Sent 14: What causes the electric charge to form?
Sent 15: Lightning is created in much the same way.
Sent 16: Both are caused by the build-up of electric charges.
Sent 17: This is also the same reason electric current flows through cables and wires.
Question: Why does electric current flow through cables and wires?.
16, 17.