Question: On what state's commemoration of the abolition of slavery in it did Khingz release an album on?

Context articles: Casimiro Berenguer
Khingz
History of slavery in Massachusetts
George French Ecton
Mary and Eliza Freeman Houses
St. George Tucker House
Liber Paradisus
Elijah P. Lovejoy Monument
Afro-Colombian Day
Juneteenth

Casimiro Berenguer Padilla was a Puerto Rican nationalist who witnessed the Ponce Massacre.
 He was the military instructor of the "Cadets of the Republic" who received permission from Ponce Mayor Tormos Diego to celebrate a parade on March 21, 1937, in commemoration of the abolition of slavery and to protest the jailing of its leaders, including Pedro Albizu Campos.
 The parade resulted in the police riot known as the Ponce Massacre.
Khingz is a hip-hop MC from Seattle, Washington.
 He was named Best MC Of The Year by "Seattle Weekly" readers in 2009 after the Juneteenth release of his most recent full-length album, "From Slaveships To Spaceships"; critics at "The Stranger", "SoundNW" Magazine, and "Seattle Weekly" described the album "royally awesome," "deeply revelatory, transformative," and "one of the boldest and most soul-baring albums [of 2009]."
 The emcee, now known for his socially conscious and politically liberal lyrics, was heavily involved in a gang between the ages of 10 and 20; he told "Seattle Weekly" that period of his life "shaped who he is now" and that "certain tell-all scars from those days linger."
Massachusetts was the first colony in New England with slave ownership and was a center for the slave trade throughout the 17th and 18th centuries.
 No legislation was passed that abolished slavery until the Thirteenth Amendment in 1865 was ratified by the state.
 Instead, the practice of slavery was ended through case law; and as an institution it died out in the late 18th century through judicial actions litigated on behalf of slaves seeking manumission.
 These court cases, starting in 1781, heard arguments contending that slavery was a violation of Christian principles and also a violation of the constitution of the commonwealth.
 1783 saw additional high-profile court cases that began a general trend of slaves winning their emancipation on a case-by-case basis through lawsuit.
 As slavery dwindled in the last decade of the 18th century in Massachusetts, many of the instances where it remained, the slaveholders sometimes applied semantics of a name change to indentured servitude to maintain their property.
 The 1790 federal census, however, listed no slaves.
 Massachusetts was a center for the abolition movement in the 19th century.
George French Ecton was a civil rights activist and Illinois' second black state legislator.
 He was born a slave in Winchester, Kentucky in 1846 to Antonio Ecton and Martha George.
 In June, 1865, after the American Civil War and the abolition of slavery, George and a friend received free papers in the mail and set off to escape slavery, as they were still being held in bondage.
 When they arrived in Cincinnati, Ohio they were hired as deck hands on the steam packet, "Sherman", working a route between Cincinnati and Wheeling, West Virginia.
 Later, in Cincinnati, George took a job at a number of hotels, including the Broadway House, Walnut Street House, Burnett House, and Spencer House.
 He became ill with small-pox while at the Walnut Street House, but recovered.
 He also began to attend night school taught by Luella Brown.
 He was reported to be a college graduate.
The Mary and Eliza Freeman Houses are historic residences at 352-4 and 358-60 Main Street in Bridgeport, Connecticut.
 The simple, clapboard-covered dwellings were built in 1848 in what became known as Little Liberia, a neighborhood settled by free blacks starting in the first quarter of the nineteenth century.
 As the last surviving houses of this neighborhood on their original foundations, these were added to the National Register of Historic Places on February 22, 1999.
 The houses are the oldest remaining houses in Connecticut built by free blacks, before the state completed its gradual abolition of slavery in 1848.
 The homes and nearby Walter's Memorial A.M.E. Zion Church are also listed sites on the Connecticut Freedom Trail.
The St. George Tucker House in one of the original colonial homes in Historic Williamsburg.
 It was built in 1718–19 for William Levingston (who, incidentally, built the first theater in America).
 The house eventually came into the hands of St. George Tucker who had moved from Bermuda to Williamsburg.
 Tucker was a lawyer and professor of law at the College of William and Mary and later became a state and federal judge.
 In 1796, Judge Tucker wrote a controversial pamphlet addressed to the General Assembly of Virginia.
 In it he laid out a plan to end slavery in Virginia because "the abolition of slavery was of great importance for the moral character of the citizens of Virginia."
 He is also famous for his 1803 edition of "Blackstone's Commentaries" which has become an indispensable American law text.
The Liber Paradisus ("Heaven Book") is a law text promulgated in 1256 by the Commune of Bologna which proclaimed the abolition of slavery and the release of serfs ("servi della gleba").
The Elijah P. Lovejoy Monument, also known as the Elijah Lovejoy Monument, Elijah Parrish Lovejoy Shaft, Lovejoy Monument, and Lovejoy State Memorial, is a memorial in the United States to the advocate of free speech and the abolition of slavery, who died fighting for these ideas when his newspaper, the "Alton Observer", was attacked and destroyed by pro-slavery fanatics.
Afro-Colombian Day, or Día de la Afrocolombianidad is an annual commemoration of the abolition of slavery in Colombia on May 21, 1851.
 May 21 is also the day of the first established free town in the America's, Palenque de San Basilio.
 Afro-Colombian Day was first celebrated in 2001.
Juneteenth, also known as Juneteenth Independence Day or Freedom Day, is an American holiday that commemorates the June 19, 1865 announcement of the abolition of slavery in the U.S. state of Texas, and more generally the emancipation of African-American slaves throughout the former Confederacy of the southern United States.
 Celebrated on June 19, the word is a portmanteau of "June" and "nineteenth".
 Juneteenth is recognized as a state holiday or special day of observance in forty-five states.