Question: Who wrote one of Johnny Cash's greatest hits?
Context: The Roadshow Revival is a Johnny Cash Tribute Festival held at Mission Park in Ventura, California in June.  The location of the Event is in close proximity to Johnny Cash's home and office in Casitas Springs and Ventura.  It is produced by Ross Emery and Johnny Cash's daughter, Cindy Cash and features Outlaw Country acts, Rockabilly bands, a Johnny Cash Memorabilia Gallery, Pin-Up Girl Pageant, and a car and bike show. Greatest Hits, Vol.  3 is a greatest hits compilation by country singer Johnny Cash, released on Columbia Records in 1978 (see 1978 in music).  It is the third and last part of the Johnny Cash "Greatest Hits" compilation series; the previous parts, "Greatest Hits, Vol.  1" and "Greatest Hits, Vol.  2", had been released in 1967 and 1971, respectively. Ring of Fire: The Best of Johnny Cash is the sixteenth album in total by the singer-songwriter Johnny Cash, released on Columbia Records in 1963 (see 1963 in music).  This album collects tracks from singles and an EP released between 1959 and 1963, Cash's first years on the Columbia label, and marked the first release of these tracks in LP format, with the exception of "I Still Miss Someone," which had previously appeared on the 1958 album "The Fabulous Johnny Cash". " Ring of Fire", one of Cash's most famous tracks, made its first LP appearance here.  "Ring of Fire" was the first #1 album when Billboard debuted their Country Album Chart on Jan. 11, 1964.  It was certified Gold on 2/11/1965 by the RIAA.  It stands as the only Columbia "greatest hits" collection to be included in the "" box set. Greatest Hits is the second greatest hits compilation released by American country music artist Tracy Byrd.  It was released in 2005 as his only album for BNA Records.  The tracks "Revenge of a Middle-Aged Woman" and "Johnny Cash" were previously unreleased; only the former was released as a single.  "Johnny Cash", however, was later recorded by Jason Aldean for his 2007 album "Relentless", and his version was a Top Ten hit on the country music charts.  The songs "Watermelon Crawl" and "I'm from the Country" were newly recorded for this compilation. Greatest Hits, Vol.  2 is, as the title implies, a greatest hits compilation by country singer Johnny Cash, released on Columbia Records in 1971 (see 1971 in music).  It combines older songs from Cash's years with Sun Records ("Hey Porter" and "Folsom Prison Blues", among others) with more recent hits, such as "A Boy Named Sue" from Cash's "At San Quentin" album and the Kris Kristofferson-penned "Sunday Mornin' Comin' Down". " Big River", one of the songs from the Sun years, was released as a single.  The album was certified Gold on 1/25/1977 and Platinum on 2/16/1995 by the R.I.A.A. "Ring of Fire", or "The Ring of Fire", is a song written by June Carter Cash and Merle Kilgore and recorded by Johnny Cash.  The single appears on Cash's 1963 album, "".  The song was originally recorded by June's sister, Anita Carter, on her Mercury Records album "Folk Songs Old and New" (1963) as "(Love's) Ring of Fire". Kenneth Jones (1952–1969), was the son of Helen Myrl Carter (of country music's Carter Family) and of Glenn Jones.  He is best remembered for a song he wrote called "Sing A Traveling Song" which appeared on Johnny Cash's albums "Hello, I'm Johnny Cash" and "Johnny Cash at Madison Square Garden".  Kenneth was Cash's nephew-in-law.  Cash's second wife, June Carter Cash, was Helen's sister.  Kenneth, or Kenny as he was also known, wrote many songs and was a talented musician.  At the time of his death he was under contract with Monument Records and appeared destined for a highly successful career.  Following his death the Carter Family recorded one of his songs, "2001 Ballad to the Future".  A few have noted the lyrics as being eerily prophetic of the September 11, 2001 terrorist attacks on the United States which took place more than thirty years after the song was written. Greatest Hits, Vol.  1 is a compilation album by country singer Johnny Cash, released in 1967 (see 1967 in music) on Columbia Records.  It is notable in that it marks the first appearance of "Jackson", Cash's famous duet with his future wife, June Carter.  The track would appear on "Carryin' On with Johnny Cash and June Carter" in August of that same year.  The album was certified Gold on 7/24/1969 and Platinum and 2x Platinum on 11/21/1986 by the RIAA. Wildwood Flower is the last solo album from June Carter Cash.  It was released in 2003 on the Dualtone record label, four months after her death and only a few days before the death of Johnny Cash, who provides backing vocals, making this the final release of his lifetime.  It was produced by their son, John Carter Cash.  The album's opening track, "Keep on the Sunny Side" was a Carter Family anthem that June Carter Cash had previously recorded twice with Johnny Cash: for the 1964 Carter Family album of the same title, and for the 1974 Johnny Cash album "The Junkie and the Juicehead Minus Me".  "The Road to Kaintuck", written by June, had previously been recorded by her husband on several occasions for Columbia Records.  The medley of "Church in the Wildwood"/"Lonesome Valley" had been a regular part of Johnny Cash concerts in the 1970s. Columbia Records 1958–1986 is a Johnny Cash compilation album released on Columbia Records in 1987 to commemorate the 28 years Cash (who had recently left Columbia for Mercury Records) recorded with the label, featuring 20 tracks dating from 1958 to 1986.  This album contains many of Cash's famous hits, including Ring Of Fire and Folsom Prison Blues, as well as some of his less-known recordings, such as Seasons of My Heart and Without Love.  This album failed to chart, and none of the selections were released as singles.
Answer: June Carter Cash