Question: Who is the principal soingwriter for the band whose 14th record is titled "Eartquake Glue"?

Context paragraphs:
Pure Prairie League: Pure Prairie League is an American country rock band whose roots go back to 1965 and Waverly, Ohio, with Craig Fuller, Tom McGrail, Jim Caughlan, and John David Call.  In 1970 McGrail named the band after a fictional 19th century temperance union featured in the 1939 Errol Flynn cowboy film "Dodge City".  The band had five consecutive Top 40 LPs in the 1970s and added a sixth in the 1980s.  The band has had a long run, active from the 1970s through the late 1980s and was revived in the late 1990s for a time, then again in 2004.  As of 2017, they are still doing at least 100 shows a year.

New Colony Six: New Colony Six (sometimes abbreviated as NC6) is an American soft rock band whose height of popularity was from the mid-1960s to the early 1970s.  From Chicago, the group placed ten singles on the Hot 100 between 1966 and 1971.  Original members were Ray Graffia (vocals), who was born March 28, 1946, Chick James (drums), Pat McBride (harmonica), Craig Kemp (organ), Wally Kemp (bass), and Gerry Van Kollenburg (guitar), who was born June 26, 1946.  Ronnie Rice (vocals, keyboards, guitar) replaced Craig Kemp as soon as Mr. Rice joined this group in 1966.  There were numerous changes in the lineup over the years.  The band's two biggest hits, which peaked on WLS months before they peaked nationally, were Rice's "I Will Always Think About You" (WLS #1 on 25 March 1968) (Hot 100 #22 on 1 June 1968) (#14 RPM Canada) and "Things I'd Like to Say" (WLS #2 on 30 December 1968) (Hot 100 #16 on 22–29 March 1969) (#6 Canada).  In Canada they also hit the charts with an earlier song "Love You So Much" (WLS #2 on 27 January 1967) (Hot 100 #61 on 25 March 1967) (#49 Canada) and the later "I Could Never Lie To You" (WLS #7 on 26 May - 2 June 1969) (Hot 100 #50 on 14 June 1969) (#38 Canada).

Arab Strap (band): Arab Strap are a Scottish indie rock band whose core members are Aidan Moffat and Malcolm Middleton.  The band were signed to independent record label Chemikal Underground, and split in 2006.  As indicated by the title of Belle & Sebastian's third record, "The Boy with the Arab Strap", and by Aidan Moffat's involvement in the two Reindeer Section albums, they were a central part of Glasgow's influential late 1990s music scene.

Heaven's Open: Heaven's Open is the 14th record album performed by Mike Oldfield, released in 1991.  It was his last album on Virgin, and also the only album he released under the name Michael Oldfield, instead of Mike Oldfield.  The producer of the album, Tom Newman's name is also spelled out in a similar manner, as Thom Newman.

Koufax (band): Koufax is an indie rock band whose members are from mainly Toledo, Ohio.  The band's self-titled debut EP was released in 1999 on independent label Doghouse Records, and got them noticed by The Get Up Kids, who signed them to their label, Vagrant Records subsidiary Heroes and Villains.  After two records on Vagrant, Koufax re-signed with Doghouse and released a third LP, "Hard Times are in Fashion", in 2005.  The band's 4th album "Strugglers" was released September 28, 2008 via Doghouse.

Earthquake Glue: Earthquake Glue is the 14th record by Dayton, Ohio rock group Guided by Voices.  Working titles for the album included "Model Prisoners of the 5 Sense Realm", "Live Like Kings Forever", and "All Sinners Welcome".  The first 25,000 copies were packaged in a numbered limited-edition digipak.  Some copies of "Earthquake Glue" contained a golden ticket; people with a golden ticket were entitled to a free copy of the anthology box set "".

B.B.Queens: B.B.Queens (B.B.クイーンズ , Bī Bī Kuīnzu ) were a 1990s J-Pop band whose debut single "Odoru Pompokolin" was the #1 song in 1990 on the Oricon charts, won the 32nd Japan Record Awards, was listed as the 3rd song on the JASRAC lists for 1991, and certified as a Million Record.

N.E.D.: No Evidence of Disease or N.E.D. is an adult-oriented alternative/folk rock band whose members are all medical doctors, mostly gynecologists and gynecologic oncologists.  Their members include John Bogess, M.D. on lead vocals, guitar, and harmonica; Joanie M. Hope, M.D. on lead vocals and guitar; robotic surgeon Nimesh Nagarsheth, M.D. on drums and percussion; William "Rusty" Robinson, M.D. on bass and harmonica, John Soper, M.D. on guitar, slide guitar, and mandolin; and William Winter, M.D. on guitar and backing vocals.  They made their self-titled debut on Motéma Music in 2009, and followed with a self-produced CD in 2010 titled "6 Degrees".  They have been profiled by Lifetime Television and thinkMTV.com, and are the subject of the documentary "No Evidence of Disease" produced by Spark Media.  Their songs focus on emotional content and make no explicit cancer references.

The American Dream (band): The American Dream (Don Lee Van Winkle, Nicky Indelicato, Nick Jameson (later of Foghat), Don Ferris, Mickey Brook) were a Philadelphia-based band whose eponymously titled album (1970) was the first ever album produced by Todd Rundgren.

Guided by Voices: Guided by Voices (often abbreviated as GBV) is an American indie rock band from Dayton, Ohio.  It has made frequent personnel changes but always maintained the presence of principal songwriter Robert Pollard.

Supporting paragraphs: Earthquake Glue Guided by Voices
Answer: Robert Pollard