Question: What insturument type did Dickie Peterson and Ely Buendia have in common?

Context paragraphs:
Please Transpose: Please Transpose EP is the final release and promotional seven-track EP plus 1-track of their only music Video "You Make Me" by the now-defunct Filipino pop-rock band The Eraserheads.  In this EP, the name of the band was shortened to ""Eheads"".  This is the only release of the band after the departure of their former vocalist Ely Buendia and features a female vocalist replacement, Kris Gorra-Dancel (from the band Fatal Posporos).  The EP was independently issued in 2002 in CD-R format only.

San Lazaro (film): San Lazaro is a Philippine horror film written and directed by Wincy Aquino Ong, starring Ramon Bautista, Wincy Aquino Ong, Nicco Manalo, Bianca King, Ely Buendia,Julia Clarete, Earl Ignacio, Kean Cipriano and Allan Forte.  It is produced by Watusi Productions and Ramon Bautista Films.  The film premiered in Cinemalaya 2011 as one of the finalists for the NETPAC (Network for the Promotion of Asian Cinema) Category.

Oh! Pleasant Hope: Oh!  Pleasant Hope is the sixth, and last, album by Blue Cheer until 1983's "The Beast Is Back".  It features less psychedelia and hard rock and includes more folk rock elements.  This is an unusual Blue Cheer album in that Dickie Peterson only sings lead on three songs.  Another unusual aspect is that the song "I'm the Light" features extensive use of the sitar and synthesizer, although on the previous album "The Original Human Being" the song "Babaji (Twilight Raga)" also featured extensive use of the aforementioned instruments.

Live at the Araneta: Live at the Araneta is the first live album by Filipino singer Jaya, released in 2001 under Vival Records in the Philippines.  The album is a live recording of a concert performed at Smart Araneta Coliseum.  As with many live albums released in the Philippines, Jaya Live at the Araneta is dominated by performances of American hits such as Aretha Franklin's great '60s hit "Respect," and also includes LaBelle's "Lady Marmalade, Nirvana's "Smells Like Teen Spirit," and Roy Orbison's "Love Hurts."  Joining her for the concert are Rico Blanco of Rivermaya, Jay Durias of South Border, Ely Buendia of Eraserheads, Wency Cornejo, KC Montero, Jeremiah and Asia's Songbird Ms. Regine Velasquez.  It also certified gold with a total sales of 20,000 copies.

The Oktaves: The Oktaves is a Filipino rock supergroup formed in 2011 consisting of Ely Buendia (of Eraserheads, Pupil, and The Mongols), Nitoy Adriano (of The Jerks), and Hilera members Chris Padilla, Ivan Garcia, and Bobby Padilla.  The band was named after the music term "Octave", which is the interval between one musical pitch and another with half or double its frequency.  This principle also mirrors the age and experience of its band members spread through three decades of Filipino music, whereas Adriano began during the 1970s, while Buendia began during the 1980s, and the rest of the younger band members began during the 1990s.  Buendia also collaborated with The Jerks and Hilera on different independent projects, which also prompted him to form the band.

The Beast Is Back: The Beast Is Back is the seventh album by a newly reformed Blue Cheer, 13 years after their previous album, "Oh!  Pleasant Hope" (1971).  It contains re-recorded versions of some of the band's most popular songs from their late-1960s heyday as well as new material.  The album features founding members Dickie Peterson and Paul Whaley.  Original guitarist Leigh Stephens did not participate in the reunion.

Magasin (Eraserheads song): Magasin (English: "Magazine") is a song by the Pinoy rock band, Eraserheads, from their 1994 album "Circus".  It was written by Ely Buendia, and was the band's second hit single from the album.  No music video was made for the song.

Ely Buendia: Eleandre "Ely" Basiño Buendia (born November 2, 1970) is a Filipino musician, writer and director who gained fame as guitarist, songwriter and lead vocalist of the popular Filipino rock band Eraserheads.  His compositions gained success and critical acclaim, topping various music charts, and are now considered classics.  Widely regarded as one of the most respected music icons in the country, he currently performs as guitarist and lead vocalist for Pupil, The Oktaves and Apartel.

Paul Whaley: Paul Whaley (born January 14, 1946) is an American drummer best known as the drummer for rock band Blue Cheer.  He was the son of country music singer Paul Whaley Sr.  He grew up in the towns of Vallejo and Winters California.  He played drums with a Davis, California band called the Oxford Circle.  Whaley is credited on the Oxford Circle album "Live at the Avalon 1966".  When he left the Oxford Circle to join Blue Cheer in 1967, the former band dissolved.  He was the longest-standing member in Blue Cheer other than founder Dickie Peterson in the band when it broke up in late 2009, following Peterson's death at age 63.

Dickie Peterson: Richard Allan Peterson (September 12, 1946 – October 12, 2009) was an American musician, best known as the bassist and lead singer for Blue Cheer.  He also recorded two solo albums: "Child of the Darkness" and "Tramp".

Supporting paragraphs: Dickie Peterson Ely Buendia
Answer: guitarist