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.

Input: Consider Input: Passage: In pre-contact times, natives traveling up Mauna Kea were probably guided more by landscape than by existing trails, as no evidence of trails has been found. It is possible that natural ridges and water sources were followed instead. Individuals likely took trips up Mauna Kea's slopes to visit family-maintained shrines near its summit, and traditions related to ascending the mountain exist to this day. However, very few natives reached the summit, because of the strict kapu placed on it.In the early 19th century, the earliest notable recorded ascents of Mauna Kea included the following:
On August 26, 1823, Joseph F. Goodrich, an American missionary, made the first recorded ascent in a single day; however, a small arrangement of stones he observed suggested he was not the first human on the summit. He recorded four ecosystems as he travelled from base to summit, and also visited Lake Waiau.
On June 17, 1825, an expedition from HMS Blonde, led by botanist James Macrae, reached the summit of Mauna Kea. Macrae was the first person to record the Mauna Kea silversword (Argyroxiphium sandwicense), saying: "The last mile was destitute of vegetation except one plant of the Sygenisia tribe, in growth much like a Yucca, with sharp pointed silver coloured leaves and green upright spike of three or four feet producing pendulous branches with brown flowers, truly superb, and almost worth the journey of coming here to see it on purpose."
In January 1834, David Douglas climbed the mountain and described extensively the division of plant species by altitude. On a second climb in July, he was found dead in a pit intended to catch wild cattle. Although murder was suspected, it was probably an accidental fall. The site, Ka lua kauka  19°53′17″N 155°20′17″W, is marked by the Douglas fir trees named for him.
In 1881, Queen Emma traveled to the peak to bathe in the waters of Lake Waiau during competition for the role of ruling chief of the Kingdom of Hawaii.
On August 6, 1889, E.D. Baldwin left Hilo and followed cattle trails to the summit.In the late 19th and early 20th centuries trails were formed, often by the movement of game herds, that could be traveled on horseback. However, vehicular access to the summit was practically impossible until the construction of a road in 1964, and it continues to be restricted. Today, multiple trails to the summit exist, in various states of use. 
Question: What is the full name of the person who was found dead in a pit intended to catch wild cattle?

Output: David Douglas.


Input: Consider Input: Passage: The second half of the 19th century has often been called the Heroic Age of Antarctic Exploration. The inhospitable and dangerous Arctic and Antarctic regions appealed powerfully to the imagination of the age, not as lands with their own ecologies and cultures, but as challenges to be conquered by technological ingenuity and manly daring.
Salomon August Andrée shared these enthusiasms, and proposed a plan for letting the wind propel a hydrogen balloon from Svalbard across the Arctic Sea to the Bering Strait, to fetch up in Alaska, Canada, or Russia, and passing near or even right over the North Pole on the way. Andrée was an engineer at the patent office in Stockholm, with a passion for ballooning.
He bought his own balloon, the Svea, in 1893 and made nine journeys with it, starting from Gothenburg or Stockholm and traveling a combined distance of 1,500 kilometres (930 mi). In the prevailing westerly winds, the Svea flights had a strong tendency to carry him uncontrollably out to the Baltic Sea and drag his basket perilously along the surface of the water or slam it into one of the many rocky islets in the Stockholm archipelago.
On one occasion he was blown clear across the Baltic to Finland. His longest trip was due east from Gothenburg, across the breadth of Sweden and out over the Baltic to Gotland. Even though he saw a lighthouse and heard breakers off Öland, he remained convinced that he was traveling over land and seeing lakes.During a couple of Svea flights, Andrée tested and tried out the drag-rope steering technique which he had developed and wanted to use on his projected North Pole expedition. Drag ropes, which hang from the balloon basket and drag part of their length on the ground, are designed to counteract the tendency of lighter-than-air craft to travel at the same speed as the wind, a situation that makes steering by sails impossible. The friction of the ropes was intended to slow the balloon to the point where the sails would have an effect (beyond that of making the balloon rotate on its axis). Andrée reported, and presumably believed, that with drag rope/sails steering he had succeeded in deviating about ten degrees either way from the wind direction.
This notion is rejected by modern balloonists; the Swedish Ballooning Association maintains that Andrée's belief that he had deviated from the wind was mistaken, being misled by inexpertise and a surfeit of enthusiasm in an environment of variable winds and poor visibility. Use of drag ropes—prone to snapping, falling off, or becoming entangled with each other or the ground, in addition to being ineffective—is not considered by any modern expert to be a useful steering technique. 
Question: What was the name of the technique Andrée tried on a couple of Svea flights?

Output: drag-rope steering technique.


Input: Consider Input: Passage: In December 2008, MTV reported that DJ AM would be making his first appearance with Barker since the two survived the plane crash. The duo performed at New Year's Nation's Los Angeles 2008 New Year's Eve Party. That same month it was reported that Goldstein had split from Moore and was dating model Haley Wood. In April 2009, Goldstein left his position at Caesars Palace to become Rain Nightclub's regular Friday night DJ in the Palms Casino Resort, Las Vegas.Goldstein filmed a cameo for the movie Iron Man 2 in June 2009, appearing as himself deejaying at the birthday party of Tony Stark (played by Robert Downey Jr.). Jon Favreau, the film's director, said that he was a fan of Goldstein; the cameo was supposed to be filmed in one day but the crew and Downey Jr. took a liking to Goldstein and his stay on set extended to approximately one week. He set up turntables and gave Favreau tips on how to DJ in between takes. Goldstein was involved with Activision's DJ Hero video game, contributing original mixes to and also appearing as a playable character. Goldstein and Barker performed at an Electronic Entertainment Expo event promoting the game in 2009.
Goldstein was the host of Gone Too Far, a drug intervention reality show for MTV. He had approached MTV in mid-2008, pitching the idea of a reality show that focused on his life to Tony DiSanto. DiSanto said that such shows were declining in popularity, and instead suggested a drug intervention show to which Goldstein agreed. The show was still in pre-production when Goldstein was injured in the plane crash. Following the crash, the show's producer Cheryl Sirulnick said she assumed the show would not go ahead, but Goldstein insisted on continuing. Eight episodes were filmed; three days before his death, Goldstein tweeted that filming had been completed. 
Question: What are the last names of the two people who survived the plane crash?


Output: Barker.