Question: What Academy Award did Walter Thomas Huston won in a 1948 American dramatic adventurous neo-western?

Context paragraphs:
John Huston: John Marcellus Huston ( ; August 5, 1906 – August 28, 1987) was an American film director, screenwriter and actor.  He wrote the screenplays for most of the 37 feature films he directed, many of which are today considered classics: "The Maltese Falcon" (1941), "The Treasure of the Sierra Madre" (1948), "The Asphalt Jungle" (1950), "The African Queen" (1951), "The Misfits" (1961), "Fat City" (1972) and "The Man Who Would Be King" (1975).  During his 46-year career, Huston received 15 Oscar nominations, won twice, and directed both his father, Walter Huston, and daughter, Anjelica Huston, to Oscar wins in different films.

The Emperor Waltz: The Emperor Waltz (German: "Ich küsse Ihre Hand, Madame" ) is a 1948 American musical film directed by Billy Wilder and starring Bing Crosby and Joan Fontaine.  Written by Wilder and Charles Brackett, the film is about a brash American gramophone salesman in Austria at the turn of the twentieth century who tries to convince Emperor Franz Joseph to buy a gramophone so the product will gain favor with the Austrian people.  "The Emperor Waltz" was inspired by a real-life incident involving Franz Joseph I of Austria.  Filmed on location in Jasper National Park in Canada, the film premiered in London, Los Angeles, and New York in the spring of 1948, and was officially released in the United States July 2, 1948.  In 1949, the film received Academy Award nominations for Best Costume Design and Best Music, as well as a Writers Guild of America Award nomination for Best Written American Musical.

Walter Varney: Walter Thomas Varney (December 26, 1888 in San Francisco, California – January 25, 1967 in Santa Barbara, California) was an American aviation pioneer who founded forerunners of two major U.S. airlines, United Airlines and Continental Airlines.  Varney was also one of the most prominent airmail contractors of the early 20th century.

The Treasure of the Sierra Madre (film): The Treasure of the Sierra Madre is a 1948 American dramatic adventurous neo-western written and directed by John Huston.  It is a feature film adaptation of B. Traven's 1927 novel of the same name, about two financially desperate Americans, Fred C. Dobbs (Humphrey Bogart) and Bob Curtin (Tim Holt), who in the 1920s join old-timer Howard (Walter Huston, the director's father) in Mexico to prospect for gold.

Walter Huston: Walter Thomas Huston ( ; born Walter Thomas Huston; April 5, 1883 – April 7, 1950) was a Canadian-born American actor and singer.  Huston won the Academy Award for Best Supporting Actor for his role in "The Treasure of the Sierra Madre", directed by his son John Huston.  He was the grandfather of Pablo Huston, Walter Anthony (Tony) Huston, actress Anjelica Huston, Danny Huston, and Allegra Huston, as well as the great-grandfather of actor Jack Huston.

Samuel Calvin (geologist): Samuel Calvin (February 2, 1840 – April 17, 1911) was Iowa's first systematic geologist, helping to make the first bedrock and landform maps of Iowa, as well as leading geological research throughout the state.  He was born in Scotland, attended Lenox College (now defunct) in Hopkinton, Iowa, where he later taught.  One of his collaborators was Thomas Huston Macbride, the notable Iowa naturalist.  Calvin became a University of Iowa professor in 1873 and the Iowa State Geologist in 1892, and led the Iowa Geological Survey from 1892 until his death.  Calvin documented the Devonian and Aftonian beds of Iowa, and was an expert on Pleistocene fauna.  He was a founder of the "American Geologist" journal.  Calvin Hall at the University of Iowa is named for him.  His photographic collection of Iowa scenes is an important collection for historians and geologists.  Calvin was president of the Geological Society of America in 1908.

Walter T. Bailey: Walter Thomas Bailey (1882–1941) was an American architect from Kewanee, Illinois.  He was the first African American graduate with a bachelor of science degree in architectural engineering from the University of Illinois at Urbana-Champaign and the first licensed African-American architect in the state of Illinois.  He worked at the Tuskegee Institute, and practiced in both Memphis and Chicago.

Anjelica Huston: Anjelica Huston ( ; born July 8, 1951) is an American actress, director and former fashion model.  Huston became the third generation of her family to win an Academy Award, when she won Best Supporting Actress for her performance in 1985's "Prizzi's Honor", joining her father, director John Huston, and grandfather, actor Walter Huston.  She also received Academy Award nominations for "Enemies, A Love Story" (1989) and "The Grifters" (1990).

Goodbye, Miss Turlock: Goodbye, Miss Turlock is a 1948 American short film directed by Edward Cahn, released as one of the "John Nesbitt's Passing Parade" series.  It won an Academy Award at the 20th Academy Awards in 1948 for Best Short Subject (One-Reel).

Walter Thomas Monnington: Sir Walter Thomas Monnington PRA (2 October 1902 – 7 January 1976) was an English painter, notable for several large murals, his work as a war artist and for his Presidency of the Royal Academy.

Supporting paragraphs: Walter Huston The Treasure of the Sierra Madre (film)
Answer: Best Supporting Actor