Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Ex Input:
Paragraph- Sent 1: During this time, Alexander adopted some elements of Persian dress and customs at his court, notably the custom of proskynesis, either a symbolic kissing of the hand, or prostration on the ground, that Persians showed to their social superiors.
Sent 2: The Greeks regarded the gesture as the province of deities and believed that Alexander meant to deify himself by requiring it.
Sent 3: This cost him the sympathies of many of his countrymen, and he eventually abandoned it.
Sent 4: A plot against his life was revealed, and one of his officers, Philotas, was executed for failing to alert Alexander.
Sent 5: The death of the son necessitated the death of the father, and thus Parmenion, who had been charged with guarding the treasury at Ecbatana, was assassinated at Alexander's command, to prevent attempts at vengeance.
Sent 6: Most infamously, Alexander personally killed the man who had saved his life at Granicus, Cleitus the Black, during a violent drunken altercation at Maracanda (modern day Samarkand in Uzbekistan), in which Cleitus accused Alexander of several judgemental mistakes and most especially, of having forgotten the Macedonian ways in favour of a corrupt oriental lifestyle.
Sent 7: Later, in the Central Asian campaign, a second plot against his life was revealed, this one instigated by his own royal pages.
Sent 8: His official historian, Callisthenes of Olynthus, was implicated in the plot; however, historians have yet to reach a consensus regarding this involvement.
Sent 9: Callisthenes had fallen out of favor by leading the opposition to the attempt to introduce proskynesis.
Question: Why did Parmenion have to die?.

Ex Output:
The death of the son necessitated the death of the father.

Ex Input:
Paragraph- Sent 1: In India to purchase some horses , British aristocrat , Lord Esketh and his wife , Edwina , come to the town of Ranchipur at the invitation of the elderly Maharani .
Sent 2: Their marriage is an unhappy one and Lord Esketh announces his intention to return to England and begin divorce proceedings .
Sent 3: The spoiled , insensitive Edwina scoffs at this .
Sent 4: She renews in Ranchipur an acquaintance with a former lover , Tom Ransome , now a dissolute alcoholic .
Sent 5: She also meets and attempts to seduce a distinguished Hindu physician , Dr. Rama Safti , a decent man who is the elderly Maharani's personal choice to succeed her someday .
Sent 6: Safti at first resists , but ultimately succumbs to Edwina's charms and falls hopelessly in love with her .
Sent 7: Lord Esketh becomes aware of this , but Safti saves him from a man-eating tiger during a safari .
Sent 8: Safti admits his love for Edwina to Lord Esketh , who is now sympathetic toward this good man's plight .
Sent 9: Ransome feels the same way , warning Edwina to stay away from Safti , a friend he admires .
Sent 10: Edwina similarly falls into disfavor with the Maharani , who explains that Safti has been raised to lead a pure life and that Edwina is unworthy of him .
Sent 11: Ranchipur suddenly is ravaged by a natural disaster , an earthquake and flood .
Sent 12: Dr. Safti is so busy saving lives that he can not personally care for Edwina , who has fallen ill .
Sent 13: Ransome looks after her as well as for young Fern Simon , who has declared her love for him .
Sent 14: When a dam is exploded by dynamite and as a result the flood waters recede , it is Dr. Safti who reveals that Ransome is the one who risked his personal safety to save the people of Ranchipur .
Question: Who looks after Edwina when she has fallen ill?.

Ex Output:
"Ransome".

Ex Input:
Paragraph- Sent 1: Abrasion is another type of weathering.
Sent 2: Like ice wedging, it is a form of mechanical weathering.
Sent 3: Like ice wedging, abrasion does not change the rock into another type of rock.
Sent 4: With abrasion, one rock or piece of sediment bumps against another rock.
Sent 5: Rocks dont normally roll around on their own, so why do they move?
Sent 6: There are a couple of reasons a rock may move.
Sent 7: Gravity can cause rocks to move.
Sent 8: They may roll downhill or fall off a cliff.
Sent 9: As they roll down a hill, they bump into each other.
Sent 10: Maybe a moving rock hits a rock that is not moving at the bottom of the hill.
Sent 11: Moving water causes rocks and sediment to move.
Sent 12: Rocks are bounced along the bottom and bump against one another.
Sent 13: As they collide, they begin to chip away at each other.
Sent 14: Angular rocks become more rounded with each collision.
Sent 15: Strong winds cause abrasion.
Sent 16: The wind carries sediment.
Sent 17: This sediment is thrown against other rocky surfaces by the wind.
Sent 18: It is like sand-blasting a rock.
Question: Abrasion and ice wedging are both forms of what kind of weathering?.

Ex Output:
Mechanical weathering.