Question: The tune of "O Sanctissima" has been notably reused in the first half of a American civil rights anthem that is most commonly attributed as having descended lyrically from what hymn?

Context paragraphs:
Karen Narasaki: Karen K. Narasaki (born April 4, 1958) is an American civil rights leader and human rights activist.  In July 2014 President Barack Obama appointed Narasaki to serve as a Commissioner on the United States Commission on Civil Rights.  She is the former president and executive director of the Asian Americans Advancing Justice | AAJC.  Advancing Justice | AAJC is a Washington, D.C.-based, nonprofit civil rights organization whose mission is to advance the human and civil rights of Asian Pacific Americans through advocacy, public policy, public education and litigation.  Prior to her post at AAJC, she served as the Washington, D.C. representative to the Japanese American Citizens League.

Alec Karakatsanis: Alec Karakatsanis (born November 7, 1983) is an American civil rights lawyer, social justice advocate, co-founder of Equal Justice Under Law, and founder and Executive Director of Civil Rights Corps, a Washington D.C. impact litigation nonprofit.  Karaktsanis' recent work has targeted the American monetary bail system.  Using the novel legal strategy of suing jurisdictions under the Equal Protection Clause of the U.S. Constitution's 14th Amendment, Civil Rights Corps won a series of landmark civil rights lawsuits which ended money bail systems in Mississippi, Missouri, Alabama, Kansas, Louisiana, Tennessee, Georgia, and other jurisdictions.  Karakatsanis' long-term goals are ending American mass incarceration, drug crimes, surveillance, the death penalty, immigration laws, war, and inequality.  His hobbies include painting, soccer, and playing the piano.

Cigar Factory: The Cigar Factory is a building on the National Historical Register.  Located at 701 East Bay Street, Charleston, South Carolina, USA, it was constructed in 1881 and opened in 1882 as the Cotton Mill of Charleston.  In 1912, it was purchased by the American Cigar Company who converted it into a cigar factory that was the largest private employer in Charleston during the 1930s.  In the 1940s, it was the location of the Civil rights strike where the civil rights anthem "We Shall Overcome" emerged.

Myrlie Evers-Williams: Myrlie Louise Evers–Williams (née Beasley; born March 17, 1933) is an American civil rights activist of the Civil Rights Movement and journalist who worked for over three decades to seek justice for the murder of her civil rights activist husband Medgar Evers in 1963.  She was also chairwoman of the NAACP, and published several books on topics related to civil rights and her husband’s legacy.  On January 21, 2013, she delivered the invocation at the second inauguration of Barack Obama.

Septima Poinsette Clark: Septima Poinsette Clark (May 3, 1898 – December 15, 1987) was an American educator and civil rights activist.  Clark developed the literacy and citizenship workshops that played an important role in the drive for voting rights and civil rights for African Americans in the Civil Rights Movement.  Septima Clark's work was commonly under appreciated by Southern male activists.  She became known as the "Queen mother" or "Grandmother" of the Civil Rights Movement in the United States.  Martin Luther King, Jr. commonly referred to Clark as "The Mother of the Movement".  Clark's argument for her position in the Civil Rights Movement was one that claimed "knowledge could empower marginalized groups in ways that formal legal equality couldn't."

We Shall Overcome: "We Shall Overcome" is a gospel song which became a protest song and a key anthem of the Civil Rights Movement.  The song is most commonly attributed as having descended lyrically from "I'll Overcome Some Day", a hymn by Charles Albert Tindley that was first published in 1900.

Marching Song of the First Arkansas: "Marching Song of the First Arkansas Colored Regiment" is one of the few Civil War-era songs inspired by the lyrical structure of "The Battle Hymn of the Republic" and the tune of "John Brown's Body" that is still performed and recorded today.  The "Marching Song" has been described as "a powerful early statement of black pride, militancy, and desire for full equality, revealing the aspirations of black soldiers for Reconstruction as well as anticipating the spirit of the civil rights movement of the 1960s."  The song's lyrics are attributed to the regiment's white officer, Captain Lindley Miller.  An almost identical song, "The Valiant Soldiers," is attributed to Sojourner Truth in post-Civil War editions of her "Narrative".  Recent scholarship supports Miller as the original author, or at least compiler, of the “Marching Song.”

O Sanctissima: "O Sanctissima " (O most holy) is a Roman Catholic hymn in Latin, seeking the prayers of the Blessed Virgin Mary, and often sung in various languages on her feast days.  The earliest known publication was from London in 1792, presenting it as a traditional song from Sicily; but no original source or date has been confirmed for the simple melody or the poetic text.  The tune is often called "Sicilian Mariners Hymn" or similar titles, referring to the seafarers' nightly invocation of Mary as their maternal protector: Our Lady, Star of the Sea.  The tune has been notably reused for the German Christmas carol "O du fröhliche" (O, how joyful), the English recessional hymn "Lord, Dismiss Us With Thy Blessing", and the first half of the American civil rights anthem "We Shall Overcome".

American Civil Rights Institute: The American Civil Rights Institute is a non-profit organization located in Sacramento, California founded by Ward Connerly and Thomas L. "Dusty" Rhodes in opposition to racial and gender preferences.  The organization describes itself as "a national civil rights organization created to educate the public on the harms of racial and gender preferences."  The American Civil Rights Institute also known as The American Civil Right Coalition wasn't fully formed until 1997, in order to take the battle against affirmative action nationwide.

Solidarity Forever: "Solidarity Forever", written by Ralph Chaplin in 1915, is perhaps the most famous union anthem.  It is sung to the tune of "John Brown's Body" and "The Battle Hymn of the Republic".  Although it was written as a song for the Industrial Workers of the World (IWW), other union movements, such as the AFL-CIO, have adopted the song as their own.  The song has been performed by musicians such as Utah Phillips, Pete Seeger, and was redone by Emcee Lynx and The Nightwatchman.  It is still commonly sung at union meetings and rallies in the United States, Australia and Canada, and has also been sung at conferences of the Australian Labor Party and the Canadian New Democratic Party.  This may have also inspired the hymn of the consumer cooperative movement, "The Battle Hymn of Cooperation", which is sung to the same tune.

Supporting paragraphs: O Sanctissima We Shall Overcome
Answer: I'll Overcome Some Day