Question: Are both Robin McKinley and Anita Diamant American authors?

full_context: Document 1: A Knot in the Grain and Other Stories: A Knot in the Grain and other Stories is a collection of short fantasy stories by author and Newbery Medalist, Robin McKinley. Published by HarperTrophy, this collection of stories came out in 1994 although several of the stories had been previously printed. This collection gives readers a taste of McKinley's style and allows brief glimpses in the worlds where magic lives and you never know what might be possible.
Document 2: E. L. Konigsburg: Elaine Lobl Konigsburg (February 10, 1930 – April 19, 2013) was an American writer and illustrator of children's books and young adult fiction. She is one of six writers to win two Newbery Medals, the venerable American Library Association award for the year's "most distinguished contribution to American children's literature."
Document 3: The Red Tent (Anita Diamant novel): The Red Tent is a novel by Anita Diamant, published in 1997 by Wyatt Books for St. Martin's Press. It is a first-person narrative that tells the story of Dinah, daughter of Jacob and sister of Joseph. She is a minor character in the Bible, but the author has broadened her story. The book's title refers to the tent in which women of Jacob's tribe must, according to the ancient law, take refuge while menstruating or giving birth, and in which they find mutual support and encouragement from their mothers, sisters and aunts.
Document 4: Robin McKinley: Jennifer Carolyn Robin McKinley (born November 16, 1952), known as Robin McKinley, is an American author of fantasy and children's books. Her 1984 novel "The Hero and the Crown" won the Newbery Medal as the year's best new American children's book.
Document 5: Jennifer Weiner: Jennifer Weiner (born March 28, 1970) is an American writer, television producer, and former journalist. She is based in Philadelphia, Pennsylvania. Her debut novel, published in 2001, was "Good in Bed". Her novel "In Her Shoes" (2002) was made into a movie starring Cameron Diaz, Toni Collette, and Shirley MacLaine.
Document 6: The Red Tent (miniseries): The Red Tent is an American television miniseries produced by Paula Weinstein and directed by Roger Young. The first two-hour episode premiered on Lifetime on December 7, 2014; the second and final episode aired the next day. The series is based on the best-selling novel of the same name by Anita Diamant.
Document 7: Anita Shreve: Anita Shreve (born 1946) is an American writer. The daughter of an airline pilot and a homemaker, she graduated from Dedham High School in Massachusetts, attended Tufts University and began writing while working as a high school teacher in Reading, Massachusetts. One of her first published stories, "Past the Island, Drifting", (published in 1975) was awarded an O. Henry Prize in 1976.
Document 8: Chalice (novel): Chalice is a novel by American fantasy author Robin McKinley. It was published in 2008 (New York: G. P. Putnam's Sons).
Document 9: Anita Diamant: Anita Diamant (born June 27, 1951) is an American author of fiction and non-fiction books. She has published five novels, the most recent of which is "The Boston Girl", a "New York Times" best seller. She is best known for her 1997 novel "The Red Tent", which eventually became a best seller and book club favorite. She has also written six guides to contemporary Jewish practice, including "The New Jewish Wedding," "Living a Jewish Life," and "The New Jewish Baby Book", as well as a collection of personal essays, "Pitching My Tent".
Document 10: Gail Carson Levine: Gail Carson Levine (born September 17, 1947) is an American author of young adult books. Her first novel, "Ella Enchanted", received a Newbery Honor in 1998.
Document 11: Nea Anna Simone: American author of African descent Nea Anna Simone (born in Houston, Texas) began writing at the age of 37. Signing with BET Books, her debut novel "Reaching BACK" received national attention from Borders Bookstores who featured it in a national ad campaign and called Simone "An Original Voice of Fiction". Within a month of its release it became a National Bestseller and eventually penetrated the foreign book market. In 2006 BET sold its publishing entity to Harlequin and Simone remained under their imprint until her contract was fulfilled. She is a "New York Times" bestselling author of Reaching Back, ReBorn and The Substance of Things, a multi-generational trilogy that placed Simone on the list of 100 top African American women authors. Nea Simone was originally published in 2002 with BET Books and became the first author reviewed as "Literary" for the publisher. Heralded by Borders Bookstore as an "Original Voice of Fiction", the chain featured Reaching Back in a national ad campaign. She was included in the anthology "Literary Divas: The Top 100+ Most Admired African-American Women in Literature".
Document 12: Robin Hobb: Robin Hobb is the pen name of Margaret Astrid Lindholm Ogden (born March 5, 1952), an American writer. She is best known for the books set in the Realm of the Elderlings, which started in 1995 with the publication of "Assassin's Apprentice", the first book in the Farseer trilogy.
Document 13: Catherine Mann: Catherine Mann is a USA Today bestselling author who has published numerous books with Berkley, Sourcebooks, and Harlequin Desire. Catherine has won a Rita Award, a Romantic Times Reviewer's Choice Award, a Booksellers' Best Award, and celebrated six RITA Award finals.
Document 14: Isaac in America: A Journey with Isaac Bashevis Singer: Isaac in America: A Journey with Isaac Bashevis Singer
Document 15: The Blue Sword: The Blue Sword is a fantasy novel written by American author Robin McKinley and published by Greenwillow Books in 1982. The novel "The Hero and the Crown" serves as a prequel. "The Blue Sword" has received several awards, including: Newbery Honor Award, ALA Best Book for Young Adults and the ALA Notable Children's Book. The story, told in the third-person omniscient perspective, is of a young woman named Angharad Crewe, called Harry, who becomes a warrior in her adopted homeland of Damar.
ground_truth: yes