In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Context: His son William Frederick Havemeyer, retired from the sugar refining business in 1842 Link Information: William Frederick Havemeyer (February 12, 1804 – November 30, 1874)  Question: How old was William Havemeyer's son when he retired from the sugar refining business?

A: Answer: 38
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Q: Context: The broadnose sevengill shark (Notorynchus cepedianus) is known to prey on the crossback stingaree Link Information: It is recognizable because of its seven gill slits, while most shark species have five gill slits Question: What is the difference between the amount of gills the species known to prey on the crossback stingaree have compared to most shark species?

A: Answer: 2
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Q: Context: Napalm released their fourth full length album "Cypress Ave." on July 28, 2017. Once again progressing into a more mature sound with a wide array of genres. Including a hip hop track featuring Sonny Cheeba from Camp Lo. Link Information:  The duo consists of rappers Sonny Cheeba (Salahadeen Wilds) and Geechi Suede Question: What are the names of the other members of the group whose member was featured in a hip-hop track on The Midnight Ghost Train's 2017 album?

A:
Answer: Geechi Suede
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