user: Summarize in bullet points some methods used to produce verdigris.

assistant: <think>
A variety of recipes have been described for obtaining this blue-green patina on copper, brass, or bronze. It was originally made by hanging copper plates over hot vinegar in a sealed pot until a green crust formed on the copper. Another method, used in the Middle Ages, was to attach copper strips to a wooden block with acetic acid, then bury the sealed block in dung. A few weeks later, the block was to be dug up, and the verdigris scraped off. In eighteenth-century Montpellier, France, it was manufactured in household cellars, "where copper plates were stacked in clay pots filled with distilled wine." The verdigris was scraped off weekly by the women of the household. Copper(II) acetate is prepared by treatment of copper(II) hydroxide with acetic acid.</think>
- Hang copper plates over hot vinegar
- Bury copper strips with wooden blocks and acetic acid in dung and dig up weeks later
- Stack copper plates in clay pots of wine
- Combine copper(II) hydroxide and acetic acid

user: What was written in Ski-U-Mah?

assistant: <think>
Shulman was born in St. Paul, Minnesota, and raised in the city's Selby-Dale neighborhood. His father Abraham, a house painter, and his mother Bessie Karchmar were Jewish immigrants from Belarus.

As a student at the University of Minnesota, where he was classmate of Thomas Heggen, Thomas R. St. George and Norman Katkov, Shulman wrote a column for the Minnesota Daily as well as pieces for Ski-U-Mah, the college humor magazine. His writing humorously exaggerated campus culture. Shortly after Shulman graduated in 1942, an agent from Doubleday persuaded Shulman to send him some clips, which resulted in the campus satire Barefoot Boy With Cheek, a surprise 1943 bestseller. In 1947 Shulman adapted Barefoot Boy into a musical of the same name.</think>
Ski-U-Mah was the college humor magazine for University of Minnesota. Shulman wrote pieces for Ski-U-Mah humorously exaggerating campus culture.

It is not clear from the text what else was written in Ski-U-Mah, but presumably there were other humorous pieces written about topics relating to University of Minnesota.

user: Extract all of the names of people in the below text separated by commas and ordered in alphabetical order by first name

assistant: <think>
In addition to being well known for articles about scenery, history, and the most distant corners of the world, the magazine has been recognized for its book-like quality and its standard of photography. It was during the tenure of Society President Alexander Graham Bell and editor Gilbert H. Grosvenor (GHG) that the significance of illustration was first emphasized, in spite of criticism from some of the Board of Managers who considered the many illustrations an indicator of an “unscientific” conception of geography. By 1910, photographs had become the magazine's trademark and Grosvenor was constantly on the search for "dynamical pictures" as Graham Bell called them, particularly those that provided a sense of motion in a still image. In 1915, GHG began building the group of staff photographers and providing them with advanced tools including the latest darkroom.The magazine began to feature some pages of color photography in the early 1930s, when this technology was still in its early development. During the mid-1930s, Luis Marden (1913–2003), a writer and photographer for National Geographic, convinced the magazine to allow its photographers to use the so-called "miniature" 35 mm Leica cameras loaded with Kodachrome film over bulkier cameras with heavy glass plates that required the use of tripods.In 1959, the magazine started publishing small photographs on its covers, later becoming larger photographs. National Geographic photography quickly shifted to digital photography for both its printed magazine and its website. In subsequent years, the cover, while keeping its yellow border, shed its oak leaf trim and bare table of contents, to allow for a full page photograph taken for one of the month's articles. Issues of National Geographic are often kept by subscribers for years and re-sold at thrift stores as collectibles. The standard for photography has remained high over the subsequent decades and the magazine is still illustrated with some of the highest-quality photojournalism in the world. In 2006, National Geographic began an international photography competition, with over eighteen countries participating.</think>
Alexander Graham Bell, Gilbert H. Grosvenor, Luis Marden