Question: What film directed by Valerie Red-Horse Mohl was based on the life of the first woman elected to serve as chief of the Cherokee Nation?

full_context: Document 1: Valerie Red-Horse: Valerie Red-Horse (born 1959 in California) is an investment banker, business owner, filmmaker and philanthropist of Cherokee heritage. She is a former CEO of two Financial Industry Regulatory Authority (FINRA) broker/dealers, Native Nations Securities and Red-Horse Securities believed to be the first Native American female owned broker-dealers.
Document 2: Woman Walks Ahead: Woman Walks Ahead is an upcoming film directed by Susanna White. The film is the story of Caroline Weldon (White), a portrait painter from New York who travels to Dakota to paint a portrait of Sitting Bull (Michael Greyeyes). The film was screened at the 2017 Toronto International Film Festival.
Document 3: Cherokee Nation: The Cherokee Nation (Cherokee: ᏣᎳᎩᎯ ᎠᏰᎵ, "Tsalagihi Ayeli"), also known as the Cherokee Nation of Oklahoma, is the largest of three Cherokee federally recognized tribes in the United States. It was established in the 20th century and includes people descended from members of the Old Cherokee Nation who relocated from the Southeast due to increasing pressure to Indian Territory and Cherokee who were forced to relocate on the Trail of Tears. The tribe also includes descendants of Cherokee Freedmen and Natchez Nation. Over 299,862 people are enrolled in the Cherokee Nation, with 189,228 living within the state of Oklahoma. According to Bureau of Indian Affairs (BIA) head Larry EchoHawk, the Cherokee Nation is not the historical Cherokee tribe but instead a "successor in interest."
Document 4: Melaw Nakehk'o: Melaw Nakehk'o is an actress, artist, traditional moose hide tanner, and co-founder of the First Nations organization Dene Nahjo. She is primarily known for her role as the kidnapped Arikara woman Powaqa in the 2015 film "The Revenant".
Document 5: Sallie Wyatt Stewart: Sallie Wyatt Stewart succeeded Mary McLeod Bethune as President of the National Association of Colored Women. During her term in office the membership of the organization was estimated at about 200,000 women.
Document 6: Mankiller (film): Mankiller is a 2017 documentary film directed by Valerie Red-Horse Mohl and executive produced by Gale Anne Hurd, concerning the life of Wilma Mankiller. The film had its US premiere on June 19, 2017 at the Los Angeles Film Festival. It was produced by Red-Horse Native Productions and Valhalla Entertainment and is a presentation of Vision Maker Media for PBS.
Document 7: Jennie Ross Cobb: Jennie Ross Cobb (Cherokee, 1881–1959) is the first known Native American woman photographer in the United States, who began taking pictures of her Cherokee community in the late 19th century. The Oklahoma Historical Society used her photos of the Murrell Home to restore that building, which is now a museum. Trained as a teacher, Cobb worked as a florist in Texas before returning to Oklahoma to spearhead the restoration of the Murrell Home.
Document 8: The Valley (2017 film): The Valley is an upcoming American indie drama film written and directed by Saila Kariat and co-produced by Yumee Jang and Saila Kariat. The film is the directorial debut of Saila Kariat.
Document 9: Marianne Schnall: Marianne Schnall is an American writer, interviewer, and feminist. Her interviews with Madeleine Albright, Dr. Jane Goodall, Gloria Steinem, Jane Fonda, Eve Ensler and others have been published by several magazines and websites. In 1995 she founded the not-for-profit website Feminist.com. She is the author of "Daring to Be Ourselves" based on her interviews with a variety of well-known women. She and Amy Richards contributed the piece "Cyberfeminism: Networking the Net" to the 2003 anthology "", edited by Robin Morgan. Marianne’s latest book is "," featuring interviews with politicians, public officials, thought leaders, writers, artists, and activists in an attempt to discover the obstacles that have held women back and what needs to change in order to elect a woman into the White House. With insights and personal anecdotes from Sheryl Sandberg, Maya Angelou, Gloria Steinem, Nancy Pelosi, Nicholas Kristof, Melissa Etheridge, Olympia Snowe, and many more, "What Will It Take to Make A Woman President?" addresses timely, provocative issues involving women, politics, and power.
Document 10: Betty Louise Bell: Betty Louise Bell was born on November 23, 1949. She is a scholar and fiction writer of Cherokee ancestry. Bell is a former director of the Native American Studies Program and former assistant professor of American culture, English, and Women's Studies at the University of Michigan. Her areas of scholarly interest include Native American literature, Women's Studies, nineteenth-century American literature, and creative writing. She earned her PhD in 1985 from Ohio State University. Her first novel "Faces in the Moon" was published in 1994 and received favorable reviews. In addition, Bell has published critical articles on Native American Literature that emphasize the political and personal aspects of Native American identity.
Document 11: The Eagle Huntress: The Eagle Huntress is a 2016 Kazakh-language British-Mongolian-American documentary film directed by Otto Bell and executive-produced by Morgan Spurlock and Daisy Ridley, who served as narrator. The film was shortlisted for an Academy Award for Best Documentary Feature but was ultimately removed from the shortlist, and it was a BAFTA Award nominee.
Document 12: Maya Gallus: Maya Gallus is a Canadian documentary filmmaker, and co-founder of Red Queen Productions with Justine Pimlott. Her films have screened at international film festivals, including Toronto International Film Festival, Montreal World Film Festival, Hot Docs Canadian International Documentary Festival, Sheffield Doc/Fest, SEOUL International Women’s Film Festival, Singapore International Film Festival, This Human World Film Festival (Vienna) and Women Make Waves (Taiwan), among others. Her work has also screened at the Museum of Fine Arts (Boston), Donostia Kultura, San Sebastián and Canada House UK, as well as theatrically in Tokyo, San Francisco, Key West and Toronto, and been broadcast around the world. She has won numerous awards, including a Gemini Award for Best Direction for Girl Inside, and has been featured in The Guardian, UK; Ms. (Magazine), Curve (Magazine), Bust (Magazine), Salon (Magazine), POV (Magazine) and The Walrus, among others. She is a Director/Writer alumna of the Canadian Film Centre and a participant in Women in the Director’s Chair. She will be honoured with a "Focus On" retrospective at the 2017 Hot Docs festival.
Document 13: Charlotte Black Elk: Charlotte A. Black Elk is a political and environmental Native American activist. She is of Oglala Lakota heritage, and is the great-granddaughter of the holy man Nicholas Black Elk. She has become well known in recent years for her role as a primary advocate for the Lakota peoples regarding the protection of the Black Hills Land Claim. She is also known for her participation in documentaries covering the history of the Lakota people, including "The Way West" (1995) and "The West" (1996).
Document 14: Bill John Baker: Bill John Baker (born February 9, 1952) is the current Principal Chief of the Cherokee Nation. First elected in October 2011, Baker defeated three-term incumbent Chief Chad "Corntassel" Smith. Prior to his election as Chief, Baker served 12 years on the Cherokee Tribal Council. In 1999, Baker unsuccessfully ran for Deputy Chief of the Cherokee Nation.
Document 15: Wilma Mankiller: Wilma Pearl Mankiller (November 18, 1945 – April 6, 2010) was a community organizer and the first woman elected to serve as chief of the Cherokee Nation. A liberal member of the Democratic Party, she served as principal chief for ten years from 1985 to 1995. She was the author of a national-bestselling autobiography, "Mankiller: A Chief and Her People" and co-authored "Every Day Is a Good Day: Reflections by Contemporary Indigenous Women". Mankiller's administration founded the Cherokee Nation Community Development Department and saw a population increase of Cherokee Nation citizens from 55,000 to 156,000.
ground_truth: Mankiller