instruction:
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 (", ").
question:
Paragraph- Sent 1: Born on May 11, 1975, in Mazraa, Lebanon, Ziad Jarrah came from an affluent family and attended private, Christian schools.
Sent 2: Like Atta, Binalshibh, and Shehhi, Jarrah aspired to pursue higher education in Germany.
Sent 3: In April 1996, he and a cousin enrolled at a junior college in Greifswald, in northeastern Germany.
Sent 4: There Jarrah met and became intimate with Aysel Senguen, the daughter of Turkish immigrants, who was preparing to study dentistry.
Sent 5: Even with the benefit of hindsight, Jarrah hardly seems a likely candidate for becoming an Islamic extremist.
Sent 6: Far from displaying radical beliefs when he first moved to Germany, he arrived with a reputation for knowing where to find the best discos and beaches in Beirut, and in Greifswald was known to enjoy student parties and drinking beer.
Sent 7: Although he continued to share an apartment in Greifswald with his cousin, Jarrah was mostly at Senguen's apartment.
Sent 8: Witnesses interviewed by German authorities after 9/11, however, recall that Jarrah started showing signs of radicalization as early as the end of 1996.
Sent 9: After returning from a trip home to Lebanon, Jarrah started living more strictly according to the Koran.
Sent 10: He read brochures in Arabic about jihad, held forth to friends on the subject of holy war, and professed disaffection with his previous life and a desire not to leave the world "in a natural way."Sent 11: In September 1997, Jarrah abruptly switched his intended course of study from dentistry to aircraft engineering-at the Technical University of Hamburg-Harburg.
Sent 12: His motivation for this decision remains unclear.
Sent 13: The rationale he expressed to Senguen-that he had been interested in aviation since playing with toy airplanes as a child-rings somewhat hollow.
Sent 14: In any event, Jarrah appears already to have had Hamburg contacts by this time, some of whom may have played a role in steering him toward Islamic extremism.
Sent 15: Following his move to Hamburg that fall, he began visiting Senguen in Greifswald on weekends, until she moved to the German city of Bochum one year later to enroll in dental school.
Sent 16: Around the same time, he began speaking increasingly about religion, and his visits to Senguen became less and less frequent.
Sent 17: He began criticizing her for not being religious enough and for dressing too provocatively.
Sent 18: He grew a full beard and started praying regularly.
Question: WHO DID JARRAH MET AND BECOME INTAMATE WITH?.
answer:
4.

question:
Paragraph- Sent 1: Magnets are able to cause a change.
Sent 2: They are able to make some other objects move.
Sent 3: They do this by creating a force.
Sent 4: This force is called a magnetic force.
Sent 5: There are different types of forces.
Sent 6: Some forces require objects to touch.
Sent 7: For example, you push a book across a table.
Sent 8: You are touching the book as it moves.
Sent 9: Think back on the levitating train.
Sent 10: It wasnt touching the track.
Sent 11: How could it move?
Sent 12: Magnets too can produce change.
Sent 13: They can produce motion just like you do.
Sent 14: Unlike you, magnets do not need to touch the other object.
Sent 15: Thats right, there is a force without making contact.
Sent 16: A magnetic force does not require objects to touch.
Sent 17: A magnet can push or pull certain items without ever touching them.
Sent 18: Thats how the maglev train works.
Question: Can pushing a book across a table be considered a force?.
answer:
6, 7, 8.

question:
Paragraph- Sent 1: Bin Ladin reportedly discussed the planes operation with KSM and Atef in a series of meetings in the spring of 1999 at the al Matar complex near Kandahar.
Sent 2: KSM's original concept of using one of the hijacked planes to make a media statement was scrapped, but Bin Ladin considered the basic idea feasible.
Sent 3: Bin Ladin, Atef, and KSM developed an initial list of targets.
Sent 4: These included the White House, the U.S. Capitol, the Pentagon, and the World Trade Center.
Sent 5: According to KSM, Bin Ladin wanted to destroy the White House and the Pentagon, KSM wanted to strike the World Trade Center, and all of them wanted to hit the Capitol.
Sent 6: No one else was involved in the initial selection of targets.
Sent 7: Bin Ladin also soon selected four individuals to serve as suicide operatives: Khalid al Mihdhar, Nawaf al Hazmi, Khallad, and Abu Bara al Yemeni.
Sent 8: During the al Matar meetings, Bin Ladin told KSM that Mihdhar and Hazmi were so eager to participate in an operation against the United States that they had already obtained U.S. visas.
Sent 9: KSM states that they had done so on their own after the suicide of their friend Azzam (Nashiri's cousin) in carrying out the Nairobi bombing.
Sent 10: KSM had not met them.
Sent 11: His only guidance from Bin Ladin was that the two should eventually go to the United States for pilot training.
Sent 12: Hazmi and Mihdhar were Saudi nationals, born in Mecca.
Sent 13: Like the others in this initial group of selectees, they were already experienced mujahideen.
Sent 14: They had traveled together to fight in Bosnia in a group that journeyed to the Balkans in 1995.
Sent 15: By the time Hazmi and Mihdhar were assigned to the planes operation in early 1999, they had visited Afghanistan on several occasions.
Sent 16: Khallad was another veteran mujahid, like much of his family.
Sent 17: His father had been expelled from Yemen because of his extremist views.
Sent 18: Khallad had grown up in Saudi Arabia, where his father knew Bin Ladin, Abdullah Azzam, and Omar Abdel Rahman (the "Blind Sheikh").
Question: Whose father was expelled from Yemen?.
answer:
16, 17.