Question: Whose sister did Melissa Sue Anderson play in "Little House on the Prairie?" 
Context: Mary Amelia Ingalls (January 10, 1865 – October 20, 1928) was born near the town of Pepin, Wisconsin.  She was the first child of Caroline and Charles Ingalls.  She was the older sister of author Laura Ingalls Wilder, who is best known for her "Little House on the Prairie" book series. Melissa Sue Anderson (born September 26, 1962) is an American-Canadian actress.  She began her career as a child actress.  Anderson is known for her role as Mary Ingalls on the NBC drama series "Little House on the Prairie". Dead Men Don't Die is a 1991 American horror-comedy film written and directed by Malcolm Marmorstein and starring Elliott Gould and Melissa Sue Anderson. Survival of Dana is a 1979 CBS made-for-TV film starring Melissa Sue Anderson, Robert Carradine, Talia Balsam (Martin Balsam's only child), Marion Ross and Judge Reinhold in his first film and Anderson in her first non-"Mary Ingalls" role as a modern-day "bad" girl while on hiatus from "Little House on the Prairie" and one of Ross' other TV roles during "Happy Days"' primetime run.  It was directed by Jack Starrett, whose only child, Jennifer, plays one of the antisocial clique's members ("Lynn") and is a teenage drama about conflicting adolescent values in affluent societies, as the titular youth (Anderson) is transferred from Fargo, North Dakota to Los Angeles' suburban San Fernando Valley after her parents' divorce. Happy Birthday to Me is a 1981 Canadian slasher film directed by J. Lee Thompson and starring Melissa Sue Anderson and Glenn Ford.  The story revolves around six brutal murders occurring around a popular high school senior's birthday.  The film was released on May 15, 1981.  While reception was generally negative, it has since achieved a cult following. The Loneliest Runner is an autobiographical made-for-television film written, and directed by "Bonanza" star Michael Landon.  It first aired on December 20, 1976 on NBC and starred Lance Kerwin, Brian Keith, DeAnn Mears, and Landon's "Little House on the Prairie" daughter, Melissa Sue Anderson.  The film was nominated for two Emmys. Dark Mansions is a 1986 television film starring Joan Fontaine, Michael York, Paul Shenar, Melissa Sue Anderson, Steve Inwood, Lois Chiles, Nicollette Sheridan, Raymond St. Jacques, Grant Aleksander, Yves André Martin, Linda Purl and Dan O'Herilhy.  It was directed by Jerry London and written by Anthony Lawrence, Nancy Lawrence and Robert McCullough. Little House on the Prairie is a 1974 American made-for-television film which served as the pilot to the "Little House on the Prairie" TV series.  It is closely based on the "Little House on the Prairie" novel; second of the "Little House" series of books by Laura Ingalls Wilder. Little House on the Prairie (known as Little House: A New Beginning in its final season) is an American western drama television series, starring Michael Landon, Melissa Gilbert, and Karen Grassle, about a family living on a farm in Walnut Grove, Minnesota, in the 1870s and 1880s.  The show is an adaptation of Laura Ingalls Wilder's best-selling series of "Little House" books.  Television producer and NBC executive Ed Friendly became aware of the story in the early 1970s.  He asked Michael Landon to direct the pilot movie.  Landon agreed on the condition that he could also play Charles Ingalls. Chattanooga Choo Choo is a 1984 comedy film starring Barbara Eden, George Kennedy, Melissa Sue Anderson and Joe Namath, directed by Bruce Bilson which was released on May 25, 1984.  The film is inspired by the popular 1941 song "Chattanooga Choo Choo" originally recorded by the Glenn Miller Orchestra and featured in the 20th Century Fox film "Sun Valley Serenade".
Answer: Laura Ingalls Wilder