Question: Which American singer-songwriter who collaborated with Shel Silverstein had a number one single in 1985?

<P0-S0> The discography of Rosanne Cash, an American singer-songwriter, consists of thirteen studio albums, six compilation albums, one tribute album, and 39 singles. <P0-S1>  The daughter of Johnny Cash, Rosanne Cash recorded her self-titled debut album in 1978 under the German label Ariola. <P0-S2>  After signing with Columbia Records in 1979, Cash's second studio album "Right or Wrong" was released. <P0-S3>  Its lead single "No Memories Hangin' Around" (a duet with Bobby Bare) reached the Top 20 on the "Billboard" Hot Country Songs chart. <P0-S4>  Cash's third studio release, "Seven Year Ache" (1981) gained major success when the title track peaked at number one on the "Billboard" Country chart, followed by "My Baby Thinks He's a Train" and "Blue Moon with a Heartache," which also reached the top spot. <P0-S5>  The album's follow-up effort, "Somewhere in the Stars" (1982) produced two Top 10 hits on the "Billboard" chart. <P0-S6>  After a 3-year hiatus, Cash issued "Rhythm & Romance" in 1985, which reached #1 on the "Billboard" Top Country Albums list. <P0-S7>  It spawned four Top 10 singles. <P0-S8>  This included the number one single, "I Don't Know Why You Don't Want Me," which won the Grammy Award for Best Female Country Vocal Performance in 1986. <P0-S9>  Her sixth album, "King's Record Shop" was released in 1987. <P0-S10>  The album peaked at number six on the country albums chart and certified gold in the United States. <P0-S11>  The four singles released from "King's Record Shop" all reached number one on the "Billboard" Country chart between 1987 and 1988, including a cover of Johnny Cash's "Tennessee Flat-Top Box." <SEP> <P1-S0> "Respectable" is a Mel and Kim song written and produced by Stock/Aitken/Waterman that became a UK number one single for one week in March 1987. <P1-S1>  It was the second UK number one single produced by Stock/Aitken/Waterman, following Dead or Alive's "You Spin Me Round (Like a Record)" in 1985, and the first UK number one single that Stock/Aitken/Waterman had written themselves. <P1-S2>  The single also topped the charts in Germany, Switzerland, the Netherlands, Belgium, Finland, Australia and New Zealand in 1987. <SEP> <P2-S0> The Highwaymen was a country music supergroup composed of four of the genre's biggest artists well known for their pioneering influence on the outlaw country subgenre: Johnny Cash, Waylon Jennings, Willie Nelson, and Kris Kristofferson. <P2-S1>  Active as a group between 1985 and 1995, these four artists recorded three major label albums as The Highwaymen: two on Columbia Records and one for Liberty Records. <P2-S2>  Their Columbia works produced three chart singles, including the number one "Highwayman" in 1985. <SEP> <P3-S0> Kristoffer Kristofferson (born June 22, 1936) is an American singer-songwriter, musician, and actor. <P3-S1>  He wrote and recorded the songs "Me and Bobby McGee", "For the Good Times", "Sunday Mornin' Comin' Down", and "Help Me Make It Through the Night". <P3-S2>  Kristofferson composed his own songs and collaborated with Nashville songwriters such as Shel Silverstein. <P3-S3>  In 1985, Kristofferson joined fellow country artists Waylon Jennings, Willie Nelson, and Johnny Cash in forming the country music supergroup The Highwaymen.