Question: Which protest song was used in the 1940's against the Cigar Factory? 

Context paragraphs:
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.

J. C. Newman Cigar Company: J.C. Newman Cigar Company was established in 1895 and is the oldest family-owned premium cigar maker in the United States.  It was founded in Cleveland, Ohio by Julius Caeser Newman, a Hungarian immigrant.  The business relocated to a historic 1910 cigar factory (Regensburg cigar factory) in the Cigar City of Ybor City, Florida in 1954.  The family business is now in its fourth generation.

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.

North Shippen–Tobacco Avenue Historic District: North Shippen–Tobacco Avenue Historic District is a historic cigar factory and tobacco warehouse complex and national historic district located at Lancaster, Lancaster County, Pennsylvania.  It includes eight contributing buildings, four of which were previously listed as the A. B. Hess Cigar Factory, and Warehouses.  They are the Consolidated Cigar Co. consisting of the M. Oppenheimer and J. Bunzl & Sons warehouses (c. 1880), J.R. Russel Tobacco Warehouse (c. 1880), and J. Best Tobacco Warehouse (c. 1880).  All four buildings are brick buildings over stone foundations used for the processing and storage of cigar leaf tobacco.

J. B. Milleysack Cigar Factory: J. B. Milleysack Cigar Factory is a historic cigar factory located at Lancaster, Lancaster County, Pennsylvania.  It was built in 1898, and is a three-story, rectangular red brick building on a stone foundation.  It is three bays by four bays and has a shed-type roof.  The building was damaged by fire in January 1990, and subsequently restored.  It housed a cigar factory and later a toy manufacturer.

Teller Brothers–Reed Tobacco Historic District: Teller Brothers–Reed Tobacco Historic District is a historic cigar factory and tobacco warehouse complex and national historic district located at Lancaster, Lancaster County, Pennsylvania.  It includes five contributing buildings, built between about 1865 and 1900.  They are the John F. Reed & Co.  Cigar Factory (c. 1865), J.R. Bitner Tobacco Warehouse (c. 1880), Lancaster Paint Works (c. 1900), and two warehouses associated with the Teller Brothers, built about 1877 and 1885.  All five buildings are brick buildings over stone foundations, 2 1/2- to 4 stories tall, and used for the processing and storage of cigar leaf tobacco.

A. B. Hess Cigar Factory, and Warehouses: A. B. Hess Cigar Factory, and Warehouses is a historic cigar factory and tobacco warehouse complex located at Lancaster, Lancaster County, Pennsylvania.  The complex consist of four rectangular red brick buildings, three to five stories tall.  They are the R. H. Brubaker Tobacco Warehouse including the Koenig & Co. warehouse (c. 1880-1881), the Franklin H. Bare Tobacco Warehouse (c. 1880-1881), and the A. B. Hess Cigar Factory (c. 1905-1908).  The buildings have been converted to residential use.

Cigar Factory Artist Studios: The Cigar Factory Artist Studios is an emerging artist community in Allentown, Pennsylvania’s art district.  The site formerly belonged to the Bondy and Lederer Cigar Company, and consists of a 101,239 square-foot repurposed cigar factory on North 4th and Green Street.  Today the building houses galleries, shops, and 45 artist studios.

Armenia Avenue: Armenia Avenue in Tampa, Florida is home to many Latin American restaurants including numerous Colombian cuisine restaurants and bakeries.  It was known as Armina Avenue originally and was once lined with cigar factories, including the Armina Cigar Factory.  It was part of the then independent city of West Tampa.  Several historic buildings are located on the street.  A. Sanataella Cigar Factory established a factory on Armenia a in 1908.  It was closed in 1989.  The Arenas Building is a brick structure from 1932.  Garcia and Vega Company opened a factory in 1907.  The site may have been occupied earlier by the Bonded Havana Cigar Company.  It also was used by the Oliva Tobacco Company

Solla-Carcaba Cigar Factory: The Solla-Carcaba Cigar Factory (also known as the Pamies-Arango Cigar Factory) is the last standing historic cigar factory in the Lincolnville Historic District.

Supporting paragraphs: Cigar Factory We Shall Overcome
Answer: We Shall Overcome