Question: Who is the bass player in the band that sang the song "All We Ever Knew"?

full_context: Document 1: All That We Needed: All That We Needed is the third studio album by American rock band Plain White T's. This is also Plain White T‘s second album with Fearless Records. In July 2007, after the release of "Every Second Counts", the song “Hey There Delilah” was re-issued as a single and sold unexpectedly well, hitting #1 on the Billboard Hot 100.
Document 2: All You Ever Knew: "All You Ever Knew" is a metalcore song written and performed by American band Eyes Set to Kill. It was released on April 4, 2010 as the first single from their third studio album "Broken Frames". The song premiered in revolvermag.com and at their MySpace. The song is about Alexia's former relationships. No music video is released to date.
Document 3: Heart (band): Heart is an American rock band that first found success in Canada and later in the United States and worldwide. Over the group's four-decade history, it has had three primary lineups, with the constant center of the group since 1973 being sisters Ann Wilson (lead singer) and Nancy Wilson (guitarist). Heart rose to fame in the mid-1970s with music influenced by hard rock and heavy metal, as well as folk music. Their popularity declined in the early 1980s, but the band enjoyed a comeback starting in 1985 and experienced even greater success with album-oriented rock hits and hard-rock ballads into the 1990s.
Document 4: The Joggers: The Joggers, formerly known as Stateside, are a four-piece band from Portland, Oregon. They play complex songs with elements of math rock which retain a pop sensibility. The guitar style of (lead singer and songwriter) Ben Whitesides and the second guitarist rejects a traditional rhythm & lead style for more scale exploration and includes elements of call and response. Murphy Kasiewicz played second guitar on "Solid Guild", but left the band before the recording of "With A Cape And A Cane" and was replaced by Dan Wilson (from Alaska) after that album, touring the US in support of it. Jake Morris has also played drums on tour with French Kicks and played drums for The Shaky Hands from December 2008 to March 2010. All members sing parts at various times, with unique and sometimes antique harmonies, and sometimes play various instruments. Ben Whitesides is the son of George M. Whitesides, one of the most decorated and wealthy chemists in the world.
Document 5: Car Seat Headrest: Car Seat Headrest is an American indie rock band originally from Leesburg, Virginia, United States, currently based in Seattle, Washington. Begun as a solo recording project in 2010 by Will Barnes (born August 23, 1992), known professionally as Will Toledo, Car Seat Headrest released 12 albums on the music platform Bandcamp. Signed to Matador Records in 2015, Car Seat Headrest began a tour in 2016 presenting material from their latest album "Teens of Denial" as a full band. Toledo's work is notable for its large online cult following. The group has received attention from publications including "Pitchfork", "Rolling Stone", "The New Yorker" and "Paste", amongst others.
Document 6: All We Know of Heaven, All We Need of Hell: All We Know of Heaven, All We Need of Hell is the second album by American rock band PVRIS. It was released August 25, 2017. The first single "Heaven" was released April 30, 2017.
Document 7: Know by Heart: Know by Heart is the American Analog Set's fourth studio album. It was released on September 4, 2001, and was their first album on Tiger Style Records. The song "The Postman" contains vocals by guest Ben Gibbard of Death Cab for Cutie and the Postal Service. Gibbard later covered the song "Choir Vandals" on Home Series Vol. V, a split EP with the American Analog Set's own Andrew Kenny. "Gone to Earth" first appeared on AmAnSet's 1996 album "The Fun of Watching Fireworks". "Aaron and Maria" was included in an issue of CMJ New Music Monthly in 2002.
Document 8: Restless Heart: Restless Heart is an American country music band established in 1984. The band's longest-lasting lineup has consisted of Larry Stewart (lead vocals), John Dittrich (drums, background vocals), Paul Gregg (bass guitar, background vocals), Dave Innis (piano, keyboards, rhythm guitar, background vocals), and Greg Jennings (lead guitar, mandolin, background vocals). Verlon Thompson was the band's original lead singer, but he was replaced by Stewart before the band signed to RCA Records Nashville. Stewart departed for a solo career in 1992; during this time, Innis, Gregg, and Dittrich alternated as lead vocalists, until Innis also left. The band was on hiatus from 1994 to 1998. During this hiatus, Dittrich briefly recorded as one-third of The Buffalo Club, and Jennings joined Vince Gill's road band. Stewart, Gregg, Dittrich, and Jennings reunited briefly in 1998 to record new material for a greatest hits album; they, along with Innis, reunited again in 2004, and this lineup has remained ever since.
Document 9: Signs of Light: Signs of Light is the third studio album by American band The Head and the Heart, and first album released through Warner Bros. Records. It was officially released on September 9, 2016. "All We Ever Knew" was released as the first single on June 3, 2016.
Document 10: The Head and the Heart: The Head and the Heart is an American indie folk band. They were formed in the summer of 2009 by Josiah Johnson (vocals, guitar, percussion) and Jonathan Russell (vocals, guitar, percussion). The band also includes Charity Rose Thielen (violin, guitar, vocals), Chris Zasche (bass), Kenny Hensley (piano), and Tyler Williams (drums). The band is signed to Warner Bros. Records and have released three albums thus far. Since March 2016, Johnson has been on hiatus due to drug addiction-related issues. The band has toured in both North America and Europe.
Document 11: All We Ever Knew: "All We Ever Knew" is a song written and recorded by American folk band The Head and the Heart, released as the lead single for their third studio album "Signs of Light" by Warner Bros. Records. The song was written by the band and produced by Jay Joyce.
Document 12: List of Heart band members: Heart is an American rock band that first found success in Canada and later in the United States and worldwide. Over the group's four-decade history it has had three primary lineups, with the constant center of the group since 1974 being sisters Ann Wilson (lead singer) and Nancy Wilson (guitarist). While it has been referred to as a duo because of the focus on leaders Ann and Nancy Wilson, Heart is a full rock group. In its original lineup the band had six members, then five in its second incarnation, and is again at six currently.
Document 13: All We Have Left: All We Have Left is the second studio album and first major album by American rock band Boyce Avenue, released on June 15, 2010. The album's first single "Every Breath" was released digitally on March 16, 2010. The album reached No. 7 on Billboard Top Heatseekers chart in July 2010.
Document 14: Everloving Records: Everloving Records was founded in 2003, having been Enjoy Records from 2000. With the success of Jack Johnson's debut "Brushfire Fairytales" the original, though defunct, Enjoy Records phoned up to reclaim their moniker. Everloving began with Jack's album, which was produced by co-founder J. P. Plunier. The company began when A&R veteran Andy Factor and Plunier partnered, after having worked together for Ben Harper. Plunier is Harper's manager and Factor was his A&R man.
Document 15: Mathien: Mathien is a Midwestern funk rock band named after lead singer and guitarist Chris Mathien. Chris wrote, produced, and played all the parts on his first album "Head, Heart & Hands" (2007). To form a live band Chris met with bassist Mike Schiff and drummer Aaron Bouslog and formed the group in Carbondale, Illinois, at Southern Illinois University. They would later be joined by keyboardist George Jackson after relocating to Chicago, Illinois. Lee England Jr. on violin was also added as a guest for the recording of the album "Hello, Again" (2009). The band played a packed House of Blues in Chicago to kick off the album and tour. With songs like "Little Richard", "Dirt That I Do","Goodbye", "Remember" and "We Don't Need to Make Love, to Know That We've Got it" the band had built a strong fan base and played shows on a 2009–2010 tour. 2011 brought some changes with the band for the recording of "The Night I was an Alpha Male" (2011). George Jackson was out and Peter Wilkins joined the band on keyboards. They kicked off with an album release party at House of Blues again and toured in the Midwest. The band also broke into college radio playlists across the country; radio support came from North Central College WONC-FM in Naperville IL and Findlay College WLFC-FM in Findley, Ohio, and many others. The title track received heavy air play plus songs like "Jamie's Son", "Betaman", "Rub It In", "The Hold" and the huge crowd favorite "Lettuce Head". 2012 the band changed drummers and welcomed Omar Jahwar to the band, Mathien began a midwest tour during 2012 building a fan base at every show they played. Later that year Chris Mathien was on WONC-FM's Local Chaos radio show and said the band will be recording a new album for release in 2013.
ground_truth: Chris Zasche