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.
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Question: Passage: In October, MacDonald introduced Thomson to Dr. James MacCallum. A frequent visitor to the Ontario Society of Artists' (OSA) exhibitions, MacCallum was admitted to the Arts and Letters Club in January 1912. There, he met artists such as John William Beatty, Arthur Heming, MacDonald and Harris. MacCallum eventually persuaded Thomson to leave Rous and Mann and start a painting career. In October 1913, MacCallum introduced Thomson to A. Y. Jackson, later a founder of the Group of Seven. MacCallum recognized Thomson's and Jackson's talents and offered to cover their expenses for one year if they committed themselves to painting full time. MacCallum and Jackson both encouraged Thomson to "take up painting seriously, [but] he showed no enthusiasm. The chances of earning a livelihood by it did not appear to him promising. He was sensitive and independent, and feared he might become an object of patronage." MacCallum wrote that when he first saw Thomson's sketches, he recognized their "truthfulness, their feeling and their sympathy with the grim fascinating northland ... they made me feel that the North had gripped Thomson as it had gripped me since I was eleven when I first sailed and paddled through its silent places." He described Thomson's paintings as "dark, muddy in colour, tight and not wanting in technical defects". After Thomson's death, MacCallum helped preserve and advocate for his work.Thomson accepted MacCallum's offer under the same terms offered to Jackson. He travelled around Ontario with his colleagues, especially to the wilderness of Ontario, which was to become a major source of inspiration. Regarding Algonquin Park, he wrote in a letter to MacCallum: "The best I can do does not do the place much justice in the way of beauty." He ventured to rural areas near Toronto and tried to capture the surrounding nature. He may have worked as a fire ranger on the Mattagami reserve. Addison and Little suggest that he guided fishing tours, although Hill finds this unlikely since Thomson had only spent a few weeks in the Park the previous year. Thomson became as familiar with logging scenes as with nature in the Park and painted them both.While returning to Toronto in November 1912, Thomson stopped in Huntsville. The visit was possibly to meet with Winfred Trainor, a woman whose family owned a cottage on Canoe Lake in Algonquin Park. Trainor was later rumoured to have been engaged to Thomson with a wedding planned for the late 1917, although little is known about their relationship.Thomson first exhibited with the OSA in March 1913, selling his painting Northern Lake (1912–13) to the Ontario Government for $250 (equivalent to CAD$5,600 in 2018). The sale afforded him time to paint and sketch through the summer and fall of 1913. 
Question: What was the last name of the person who was a founder of the Group of Seven?

Answer: Jackson.


Question: Passage: Louis Salinger, an Interpol detective, and Eleanor Whitman, an Assistant District Attorney from Manhattan, are investigating the International Bank of Business and Credit, which funds activities such as money laundering, terrorism, arms trading, and the destabilization of governments. Salinger's and Whitman's investigation takes them from Berlin to Milan, where the IBBC assassinates Umberto Calvini, an arms manufacturer who is an Italian prime ministerial candidate. The bank's assassin diverts suspicion to a local assassin with political connections, who is promptly killed by a corrupt policeman. Salinger and Whitman get a lead on the second assassin, but the corrupt policeman shows up again and orders them out of the country. At the airport they are able to check the security camera footage for clues on the whereabouts on the bank's assassin, and follow a suspect to New York City.
In New York, Salinger and Whitman are met by two New York Police Department detectives, Iggy Ornelas and Bernie Ward, who have a photograph of the assassin's face when he arrived in New York airport. Salinger, Ornelas, and Ward locate Dr. Isaacson to whose practice the assassin's leg brace has been traced. They find the assassin and follow him to the Solomon R. Guggenheim Museum.
Jonas Skarssen, the chairman of the IBBC, reveals to his senior men White and Wexler that the bank had Calvini killed so that they could deal with his sons to buy missile guidance systems in which the bank has invested. Since the bank knows that Salinger and Whitman are close to finding their assassin, they send a hit team to kill him at a meeting between him and his handler, Wexler. Wexler leaves and is arrested by Ornelas. As Salinger speaks to the assassin, a shootout at the Guggenheim erupts when a number of gunmen attempt to kill them with automatic weapons. They escape, but the assassin is mortally wounded. 
Question: What are the first names of the people who locate Dr. Isaacson?

Answer: Louis.


Question: Passage: Critical reception to Vol. 3: The Subliminal Verses was generally positive. It received a score of 70% on review aggregator Metacritic based on 12 reviews. Johnny Loftus of AllMusic called the album "not just another flashy alt-metal billboard", praising the band's "dedication to making it a Slipknot album". Todd Burns of Stylus wrote that people who accuse the band of having "softened" are "mistaking softness for maturation". Burns went on to call the album "the best pop inflected metal album since System of a Down's Toxicity". Sean Richardson of Entertainment Weekly gave the album an A− and wrote that it is a "deranged hippie update" of Slayer's "masterpiece" Reign in Blood, which was also produced by Rubin. Q hailed Vol. 3: The Subliminal Verses as "a triumph". John Robb of PlayLouder complimented Slipknot's unexpected rise to become "one of the biggest groups in the world", dubbing "Before I Forget" a "classic [Slipknot] anthem". Robb added that the album is better than Iowa, citing its "differing textures". Rolling Stone gave the album a rating of 3 out of 5, stating the album presented "newer extremes" for the band, "which in Slipknot's case means tunefulness and traditional song structures".A review from the BBC praised the album, declaring that there "is no finer metal band on the planet". It cited the group's integration of "hyperactive bass drums, complex, compelling riffs and ridiculously fast fretwork" with more melodic styles and described Vermilion as "the key track ... an emotional, melodramatic, utterly convincing rollercoaster ride".Alternative Press criticized the album, writing that it "plays out like a tepid, second-rate version of Iowa, which pretty much makes it a third-rate anything else." Yahoo!'s Chris Heath also reviewed the album negatively, writing that "The Nameless" combines "the ludicrously vicious and ridiculously placid" and that by doing so makes the track feel "awkward". Heath added, "the themes are predictably absurd ... yet mildly comical given the inclusion of such disparate styles stationed side by side."Vol. 3: The Subliminal Verses peaked at position number two on the US Billboard 200, online, Australian Recording Industry Association, and Canadian sales charts. The album was certified Platinum in the United States on February 21, 2005. In 2006, the band won their first Grammy for Best Metal Performance with "Before I Forget". In 2009, Metal Hammer called it one of the "Albums of the Decade". It was also rated 31st in UK magazine Kerrang!'s "The 50 Best Albums of the 21st Century" reader poll.
In 2005, the album was ranked number 396 in Rock Hard magazine's book of The 500 Greatest Rock & Metal Albums of All Time. 
Question: What date was the album that got a 3 out of 5 from Rolling Stone certified platinum in the United States?

Answer:
February 21, 2005.