A square wave is a non-sinusoidal periodic waveform in which the amplitude alternates at a steady frequency between fixed minimum and maximum values, with the same duration at minimum and maximum.
 The transition between minimum and maximum is instantaneous for an ideal square wave; this is not realizable in physical systems.
 Square waves are often encountered in electronics and signal processing.
 Its stochastic counterpart is a two-state trajectory.
 A similar but not necessarily symmetric wave, with arbitrary durations at minimum and maximum, is called a pulse wave (of which the square wave is a special case).
Oregon Ballot Measure 61 was an initiated state statute ballot measure that enacted law to create mandatory minimum prison sentences for certain theft, identity theft, forgery, drug, and burglary crimes.
The Ogun prison break was an attack on the Sagamu minimum prison in the southwestern Nigerian city of Ogun State by the prisoners.
 The attack occurred on 4 January 2013.
 About 20 prisoners escaped from the prison leaving several prison officials and prisoners seriously injured with no death recorded.
 About 4 escaped convicts were rearrested by the Armed Squad of the Prison Service.
 It was reported that one escaped convict returned to the prison voluntarily to serve out his short sentence
Gospel blues or holy blues is a form of blues-based gospel music that has been around since the inception of blues music, a combination of blues guitar and evangelistic lyrics.
 Notable gospel blues performers include Blind Willie Johnson, Sister Rosetta Tharpe, Reverend Gary Davis and Washington Phillips.
 Blues musicians such as Boyd Rivers, Blind Lemon Jefferson, Charley Patton, Sam Collins, Josh White, Blind Boy Fuller, Blind Willie Mctell, Bukka White, Sleepy John Estes and Skip James have recorded a fair number of Gospel and religious songs, these were often commercially released under a pseudonym.
Race in the United States criminal justice system refers to the unique experiences and disparities in the United States in regard to the policing and prosecuting of various races.
 There have been different outcomes for different racial groups in convicting and sentencing felons in the United States criminal justice system.
 Experts and analysts have debated the relative importance of different factors that have led to these disparities.
 Minority defendants are charged with crimes requiring a mandatory minimum prison sentence more often, in both relative and absolute terms (depending on the classification of race, mainly in regards to Hispanics), leading to large racial disparities in correctional facilities.
"Fixin’ to Die Blues" is song by American blues musician Bukka White.
 It is performed in the Delta blues style with White's vocal and guitar accompanied by washboard rhythm.
 White recorded it in Chicago on May 8, 1940, for record producer Lester Melrose.
 The song was written just days before, along with eleven others, at Melrose's urging.
"Shake 'Em On Down" is a Delta blues song by American musician Bukka White.
 He recorded it in Chicago in 1937 around the beginning of his incarceration at the infamous Parchman Prison Farm in Mississippi.
"Parchman Farm" or "Parchman Farm Blues" is a blues song first recorded by American Delta blues musician Bukka White in 1940.
 It is an autobiographical piece, in which White sings of his experience at the infamous Mississippi State Penitentiary, known as Parchman Farm.
 Jazz pianist-vocalist Mose Allison adapted it for his own "Parchman Farm" and "New Parchman", which are among his most popular songs.
 Numerous artists have recorded their own renditions, usually based on Allison's songs.
Mississippi State Penitentiary (MSP), also known as Parchman Farm, is a prison farm, the oldest prison, and the only maximum security prison for men in the state of Mississippi.
Lockhart v. United States, 577 U.S. ___ (2016) , is a United States Supreme Court decision concerning the interpretation of a federal statute.
 18 USC §2252(b)(2) states that a defendant convicted of possessing child pornography is subject to a mandatory 10 year minimum prison sentence if they have "a prior conviction...under the laws of any State relating to aggravated sexual abuse, sexual abuse, or abusive sexual conduct involving a minor or ward."
 Avondale Lockhart, convicted of possession of child pornography, had a prior conviction for sexual abuse of his 53-year-old girlfriend under New York State law.
 He was sentenced to 10 years in prison under §2252(b)(2).
 He appealed claiming that the qualifier "involving a minor or ward" applies to the whole series, making his prior conviction not trigger the sentence enhancement.
 In a 6-2 decision, the Supreme Court held that the phrase only modifies the final item in the series, upholding the 10 year minimum sentence imposed on Lockhart.

Question: Is the song by Bukka White about a maximum or minimum prison?
Answer: maximum security prison