In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Ex Input:
Passage: Marojejy National Park is a national park in the Sava Region of northeastern Madagascar. It covers 55,500 ha (214 sq mi) and is centered on the Marojejy Massif, a mountain chain that rises to an elevation of 2,132 m (6,995 ft).  Access to the area around the massif was restricted to research scientists when the site was set aside as a strict nature reserve in 1952.  In 1998, it was opened to the public when it was converted into a national park.  It became part of the World Heritage Site known as the Rainforests of the Atsinanana in 2007.  Despite its rugged terrain, poaching and selective logging are still persistent problems, particularly since the start of the 2009 political crisis in Madagascar.  Mining, slash-and-burn agriculture, and wood collection also pose threats to the park and its wildlife.
The wide range of elevations and rugged topography of the massif create diverse habitats that transition quickly with changes in altitude.  Warm, dense rainforest can be found at lower elevations, followed by shorter forests at higher elevations, followed still by cloud forest, and topped near the peaks with the only remaining undisturbed mountain scrub in Madagascar.  Better growing conditions for plants can be found on the eastern side of the mountains, which receives more rain than the western side.  This habitat diversity lends itself to high levels of biodiversity.  At least 118 species of bird, 148 species of reptile and amphibian, and 11 species of lemur are known to occur within Marojejy National Park.  One of the lemurs, the silky sifaka (Propithecus candidus) is listed among "The World's 25 Most Endangered Primates".  The helmet vanga (Euryceros prevostii) is considered the iconic bird species of the park.
One path leads from the entrance of the park to the summit.  There are three camps along the route: Camp Mantella at 450 m (1,480 ft) in elevation in lowland rainforest, Camp Marojejia at 775 m (2,543 ft) at the transition between lowland and montane rain forest, and Camp Simpona at 1,250 m (4,100 ft) in the middle of the montane rainforest.  Camp Simpona acts as a base camp for the trek to the summit, a route that stretches 2 km (1.2 mi) and can take up to four or five hours to traverse. 
Question: How many km is the route that stretches to the summit in the park that is centered on the Marojejy Massif?

Ex Output:
2.


Ex Input:
Passage: Four lifelong friends from the Boston neighborhood of Charlestown, Douglas "Doug" MacRay, James "Jem" Coughlin, Albert "Gloansy" MacGloan, and Desmond "Dez" Elden, rob a bank. They take the manager, Claire Keesey, hostage, but release her unharmed. When they find out Claire lives in their neighborhood, Doug begins to follow her to find out how much she has told the police, and to make sure that Jem does not eliminate her as a witness. Soon a romance grows between them, which Doug hides from the gang. As they grow closer, Doug tells Claire of his search for his long-lost mother, who he believes went to live with his aunt in Tangerine, Florida. He also recounts his chance to be a professional hockey player which he threw away for a life of crime, following in his father's footsteps. She in turn tells Doug that she saw a tattoo on one of the robbers, and he realizes that she can identify Jem and send them all to prison. He knows that Jem will kill her if he discovers the truth, so he persuades her that the authorities cannot protect her, and she decides not to tell the police.
After Claire tells Doug about being harassed and her car vandalized by Alex, a local Dominican thug, Doug enlists Jem for a favor, which they can never talk about. Doug and Jem don hockey masks and violently assault the offenders without Jem knowing the true reason for the favor is to protect Claire. 
Question: What are the aliases of the people who take a hostage?

Ex Output:
Doug.


Ex Input:
Passage: On 13 June walruses attacked and damaged the kayaks, causing another stop for repairs. On 17 June, as they prepared to leave again, Nansen thought he heard a dog bark and went to investigate. He then heard voices, and a few minutes later encountered a human being. It was Frederick Jackson, who had organised his own expedition to Franz Josef Land after being rejected by Nansen, and had based his headquarters at Cape Flora on Northbrook Island, the southernmost island of the archipelago. Jackson's own account records that his first reaction to this sudden meeting was to assume the figure to be a shipwrecked sailor, perhaps from the expedition's supply ship Windward which was due to call that summer. As he approached, Jackson saw "a tall man, wearing a soft felt hat, loosely made, voluminous clothes and long shaggy hair and beard, all reeking with black grease". After a moment's awkward hesitation, Jackson recognised his visitor: "You are Nansen, aren't you?", and received the reply "Yes, I am Nansen."Johansen was rescued, and the pair taken to the base at Cape Flora, where they posed for photographs (in one instance re-enacting the Jackson–Nansen meeting) before taking baths and haircuts. Both men seemed in good health, despite their ordeal; Nansen had put on 21 pounds (9.5 kg) in weight since the start of the expedition, and Johansen 13 pounds (5.9 kg). In honour of his rescuer, Nansen named the island where he had wintered "Frederick Jackson Island". For the next six weeks Nansen had little to do but await the arrival of Windward, worrying that he might have to spend the winter at Cape Flora, and sometimes regretting that he and Johansen had not pressed on to Spitsbergen. Johansen noted in his journal that Nansen had changed from the overbearing personality of the Fram days, and was now subdued and polite, adamant that he would never undertake such a journey again. On 26 July Windward finally arrived; on 7 August, with Nansen and Johansen aboard, she sailed south and on 13 August reached Vardø. A batch of telegrams was sent, informing the world of Nansen's safe return. 
Question: What was the last name of the human being Nansen encountered?

Ex Output:

Jackson.