Problem: Jan Zizka z Trocnova a Kalicha (Czech pronunciation: ['jan 'ZISka] ( listen); German: Johann Ziska; English: John Zizka of Trocnov and the Chalice) was a Czech general, a contemporary and follower of Jan Hus, Hussite military leader, and later also a Radical Hussite who led the Taborites. Zizka is held to be one of the most renowned military leaders by many historians and today he is widely considered a Czech national hero. He was born in the small village of Trocnov (now part of Borovany) in the Kingdom of Bohemia into an aristocratic family.

Zizka helped develop tactics of using wagon forts, called vozova hradba in Czech or Wagenburg by the Germans, as mobile fortifications. When the Hussite army faced a numerically superior opponent they prepared carts for the battle by forming them into squares or circles. The carts were joined wheel to wheel by chains and positioned aslant, with their corners attached to each other, so that horses could be harnessed to them quickly, if necessary. In front of this wall of carts a ditch was dug by camp followers. The crew of each cart consisted of 16-22 soldiers: 4-8 crossbowmen, 2 handgunners, 6-8 soldiers equipped with pikes or flails (the flail was the Hussite "national weapon"), 2 shield carriers and 2 drivers.  The Hussites' battle consisted of two stages, the first defensive, the second an offensive counterattack. In the first stage the army placed the carts near the enemy army and by means of artillery fire provoked the enemy into battle. The artillery would usually inflict heavy casualties at close range.  In order to avoid more losses, the enemy knights finally attacked. Then the infantry hidden behind the carts used firearms and crossbows to ward off the attack, weakening the enemy. The shooters aimed first at the horses, depriving the cavalry of its main advantage. Many of the knights died as their horses were shot and they fell.  As soon as the enemy's morale was lowered, the second stage, an offensive counterattack, began. The infantry and the cavalry burst out from behind the carts striking violently at the enemy, mostly from the flanks. While fighting on the flanks and being shelled from the carts the enemy was not able to put up much resistance. They were forced to withdraw, leaving behind dismounted knights in heavy armor who were unable to escape the battlefield. The enemy armies suffered heavy losses and the Hussites soon had the reputation of not taking captives.

What was wagenburg

Answer with quotes: Zizka helped develop tactics of using wagon forts, called vozova hradba in Czech or Wagenburg by the Germans, as mobile fortifications.

Background: J. R. Cash was born on February 26, 1932 in Kingsland, Arkansas, to Ray Cash and Carrie Cloveree (nee Rivers). He was the fourth of seven children, who were in birth order: Roy, Margaret Louise, Jack, J. R., Reba, Joanne, and Tommy (who also became a successful country artist). He was primarily of English and Scottish descent. As an adult he traced his surname to 11th-century Fife, after meeting with the then-laird of Falkland, Major Michael Crichton-Stuart.
Context: Cash began performing concerts at prisons starting in the late 1950s. He played his first famous prison concert on January 1, 1958, at San Quentin State Prison. These performances led to a pair of highly successful live albums, Johnny Cash at Folsom Prison (1968) and Johnny Cash at San Quentin (1969). Both live albums reached number 1 on Billboard country album music and the latter crossed over to reach the top of the Billboard pop album chart. In 1969 Cash became an international hit when he eclipsed even the Beatles by selling 6.5 million albums. In comparison, the prison concerts were much more successful than his later live albums such as Strawberry Cake recorded in London and Live at Madison Square Garden, which peaked at #33 and #39 on the album charts respectively.  The Folsom Prison record was introduced by a rendition of his "Folsom Prison Blues," while the San Quentin record included the crossover hit single "A Boy Named Sue," a Shel Silverstein-penned novelty song that reached No. 1 on the country charts and No. 2 on the U.S. Top Ten pop charts. The AM versions of the latter contained profanities which were edited out of the aired version. The modern CD versions are unedited thus making them longer than the original vinyl albums, though they retain the audience reaction overdubs of the originals.  Cash performed at the Osteraker Prison in Sweden in 1972. The live album Pa Osteraker ("At Osteraker") was released in 1973. "San Quentin" was recorded with Cash replacing "San Quentin" with "Osteraker". In 1976, a further prison concert, this time at Tennessee Prison, was videotaped for TV broadcast and received a belated CD release after Cash's death as A Concert Behind Prison Walls.
Question: What was the diffrence between the two
Answer: The Folsom Prison record was introduced by a rendition of his "Folsom Prison Blues,

Question:
Barclay was born in Chicago Heights, Illinois. He attended La Lumiere School, a private college preparatory boarding school in La Porte, Indiana. On scholarship, he was one of the first African-Americans to attend the school, Barclay went on to Harvard College, where he was extremely active in student musical theatre productions and the a cappella singing group The Harvard Krokodiloes.
In June 2013, Paris was elected President of the Directors Guild of America, the first African-American and first openly gay President in the history of the Guild . After the vote, Barclay expressed gratitude for the honor and admiration for the Union's history, saying "I am profoundly honored to be elected President of the DGA.... The DGA has worked for more than three-quarters of a century to advance the creative and economic rights of directors and their teams and I look forward to continuing this strong tradition of service. As the son of a glass blower and a tile maker from Chicago, I am extremely humbled to have the honor to serve in the footsteps of the legendary leaders of the DGA like Frank Capra, Robert Wise and Gil Cates." Barclay was nominated for the Presidency by past-President Michael Apted, who said of him, "Paris' qualifications for DGA president are exceptional.... His understanding of the issues facing directors and their teams is outstanding and his ability to resolve problems and create solutions is beyond compare." His nomination was seconded by Steven Soderbergh, who said of Barclay, "This is a great moment for our Guild; Paris will be a phenomenal leader as we move into the future." Paris was enthusiastically re-elected in June 2015 to continue his notable presidency.  Before being elected DGA President, Barclay served four terms as First Vice President of the DGA, where he was the first African-American Officer in the history of the guild. While serving as First Vice President, Paris was also chair of the DGA's Political Action Committee, whose mission it is to promote the interests of DGA members to state and federal lawmakers. Their top issues include battling online copyright threats and promoting production tax incentives. He also served on the Western Directors Council and co-chaired the Diversity Task Force, whose mission is to encourage the hiring of women and minority directors to networks and studios. In addition, Paris served as a board member of the DGA-affiliated Franco-American Cultural Fund, which promotes cultural exchange between French and American directors.  Barclay completed his second term as DGA president in June 2017. He was succeeded by Thomas Schlamme, whom he worked with on The West Wing and Manhattan, as well as on the DGA board.
Answer this question using a quote from the text above:

What was guild of America?

Answer:
The DGA has worked for more than three-quarters of a century to advance the creative and economic rights of directors and their teams