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.

Passage: ABKCO Industries was formed in 1968 by Allen Klein as an umbrella company to ABKCO Records. Klein hired May Pang as a receptionist in 1969. Through involvement in a project with ABKCO, Lennon and Ono met her the following year. She became their personal assistant. In 1973, after she had been working with the couple for three years, Ono confided that she and Lennon were becoming estranged. She went on to suggest that Pang should begin a physical relationship with Lennon, telling her, "He likes you a lot." Astounded by Ono's proposition, Pang nevertheless agreed to become Lennon's companion. The pair soon left for Los Angeles, beginning an 18-month period he later called his "lost weekend". In Los Angeles, Pang encouraged Lennon to develop regular contact with Julian, whom he had not seen for two years. He also rekindled friendships with Starr, McCartney, Beatles roadie Mal Evans, and Harry Nilsson. While Lennon was drinking with Nilsson, he misunderstood something that Pang had said and attempted to strangle her. Lennon relented only after he was physically restrained by Nilsson.In June, Lennon and Pang returned to Manhattan in their newly rented penthouse apartment where they prepared a spare room for Julian when he visited them.  Lennon, who had been inhibited by Ono in this regard, began to reestablish contact with other relatives and friends.  By December, he and Pang were considering a house purchase, and he refused to accept Ono's telephone calls. In January 1975, he agreed to meet Ono, who claimed to have found a cure for smoking. After the meeting, he failed to return home or call Pang. When Pang telephoned the next day, Ono told her that Lennon was unavailable because he was exhausted after a hypnotherapy session. Two days later, Lennon reappeared at a joint dental appointment; he was stupefied and confused to such an extent that Pang believed he had been brainwashed. Lennon told Pang that his separation from Ono was now over, although Ono would allow him to continue seeing her as his mistress. 
Question: What is the first name of the person who agreed to become Lennon's companion?
May.

Passage: With the piece set to open on 26 December, Gilbert first read the libretto to the cast on 14 December, but Toole, who was playing the central role of Thespis, did not return from a tour of the British provinces until 18 December. He then appeared in nine performances at the Gaiety in the six days immediately after his return, and other actors had similar commitments. In addition, Hollingshead had committed the company to perform a pantomime at The Crystal Palace on 21 December, which included many of the performers who would be in Thespis. Lastly, Thespis was to play as the afterpiece to an H. J. Byron comedy, Dearer than Life, which shared many of its actors, including Toole and Fred Sullivan, and had to be rehearsed at the same time.Despite the short time available for rehearsals, Sullivan recalled that Gilbert insisted that the chorus play a major role, as it would do in their later Savoy operas:
Until Gilbert took the matter in hand choruses were dummy concerns, and were practically nothing more than a part of the stage setting. It was in 'Thespis' that Gilbert began to carry out his expressed determination to get the chorus to play its proper part in the performance. At this moment it seems difficult to realise that the idea of the chorus being anything more than a sort of stage audience was, at that time, a tremendous novelty. In consequence of this innovation, some of the incidents at the rehearsal of 'Thespis' were rather amusing. I remember that, on one occasion, one of the principals became quite indignant and said, 'Really, Mr. Gilbert, why should I stand here? I am not a chorus-girl!' to which Gilbert replied curtly, 'No, madam, your voice is not strong enough, or no doubt you would be.'. 
Question: What is the last name of the person who had an expressed determination to get the chorus to play its proper part in the performance?
Gilbert.

Passage: The seabed contains enormous reserves of minerals which can be exploited by dredging. This has advantages over land-based mining in that equipment can be built at specialised shipyards and infrastructure costs are lower. Disadvantages include problems caused by waves and tides, the tendency for excavations to silt up and the washing away of spoil heaps. There is a risk of coastal erosion and environmental damage.
Seafloor massive sulphide deposits are potential sources of silver, gold, copper, lead and zinc and trace metals since their discovery in the 1960s. They form when geothermally heated water is emitted from deep sea hydrothermal vents known as "black smokers". The ores are of high quality but prohibitively costly to extract. Small scale mining of the deep sea floor is being developed off the coast of Papua New Guinea using robotic techniques, but the obstacles are formidable.There are large deposits of petroleum, as oil and natural gas, in rocks beneath the seabed. Offshore platforms and drilling rigs extract the oil or gas and store it for transport to land. Offshore oil and gas production can be difficult due to the remote, harsh environment. Drilling for oil in the sea has environmental impacts. Animals may be disorientated by seismic waves used to locate deposits, probably causing the beaching of whales. Toxic substances such as mercury, lead and arsenic may be released. The infrastructure may cause damage, and oil may be spilt.Large quantities of methane clathrate exist on the seabed and in ocean sediment at a temperature of around 2 °C (36 °F) and these are of interest as a potential energy source. Some estimates put the amount available at between one and 5 million cubic kilometres (0.24 to 1.2 million cubic miles). Also on the seabed are manganese nodules formed of layers of iron, manganese and other hydroxides around a core. In the Pacific these may cover up to 30 percent of the deep ocean floor. The minerals precipitate from seawater and grow very slowly. Their commercial extraction for nickel was investigated in the 1970s but abandoned in favour of more convenient sources. In suitable locations, diamonds are gathered from the seafloor using suction hoses to bring gravel ashore. In deeper waters, mobile seafloor crawlers are used and the deposits are pumped to a vessel above. In Namibia, more diamonds are now collected from marine sources than by conventional methods on land. 
Question: What has advantages over land-based mining?

dredging.