Question: In which band the musicians are identical sisters, in Rain Parade or Tegan and Sara?

Context paragraphs:
Derek See: Derek See (born June 6, 1975) is an American musician, music producer and music writer.  He has performed as a soloist as well as with The Gentle Cycle, The Bang Girl Group Revue, Joel Gion & The Primary Colours, Myron & E, and The Rain Parade, and Careless Hearts.  See began playing guitar with The Chocolate Watchband in the fall of 2015, and also plays in Country Joe McDonald's Electric Music Band.

MS Royal Iris: MS "Royal Iris" is a 1971 built car ferry/cruise ferry which was later rebuilt into a cruise ship in 1981.  She is the last surviving ship ever owned by the Chandris Lines.  She is the last surviving ship out of three near identical sisters, the others being the ill-fated "Scandinavian Star" and the Fred.  Olsen & Co. ferry "Bolero".  In late 2014, Mano Cruise stopped the ship's service.

Rain Parade: The Rain Parade is a band that was originally active in the Paisley Underground scene in Los Angeles in the 1980s, and that reunited and resumed touring in 2012.

Heartthrob (album): Heartthrob is the seventh studio album by Canadian pop duo Tegan and Sara, released on January 29, 2013 on Neil Young's label Vapor Records through Warner Bros.  Records.  "Heartthrob" debuted at number 3 on the "Billboard" 200 chart, selling 49,000 copies in its first week and securing the band's highest chart position to date.  It is also the first Tegan and Sara record to chart in New Zealand, the UK and Ireland.  On July 4, 2013, "Heartthrob" was certified Gold in Canada.  As of April 2016, "Heartthrob" has sold 199,000 copies in the United States.

Under Feet Like Ours: Under Feet Like Ours is a studio album published independently by the Canadian singer-songwriters Tegan and Sara.  It was originally launched under "Sara and Tegan" in limited quantities in 1999, and was re-edited under "Tegan and Sara".  It was re-released again in 2001 with the bonus track "Frozen" from This Business of Art.

Tegan and Sara: Tegan and Sara are a Canadian indie pop band formed in 1998 in Calgary, Alberta, composed of identical twin sisters Tegan Rain Quin and Sara Keirsten Quin (born September 19, 1980).  Both musicians are songwriters and multi-instrumentalists.

Dionne quintuplets: The Dionne quintuplets (] ; born May 28, 1934) are the first quintuplets known to have survived their infancy.  The identical sisters were born in Canada, just outside Callander, Ontario, near the village of Corbeil.  All five survived to adulthood.

An Horse: An Horse is a two-person indie rock band from Brisbane, Australia, composed of Kate Cooper of Iron On on vocals and guitar and Damon Cox of Intercooler on drums.  In 2008 they toured the United States as an opening act for Tegan and Sara, prior to the release of their first album.  In August 2008, they opened for Death Cab for Cutie for their Australian tour.  They also opened for Silversun Pickups along with Cage The Elephant in October 2009 for an east coast leg of their Swoon tour.  After their own 2009 North American tour, An Horse played as a supporting act for Tegan and Sara in Canada in 2010.  In 2012 they accompanied Nada Surf on tour in the United States.

Closer (Tegan and Sara song): "Closer" is a song written and performed by Canadian duo Tegan and Sara.  The song was written by Tegan Quin with contributions from Sara Quin and Greg Kurstin for their seventh studio album, "Heartthrob" (2013).  The song was released as the lead single from the album in September 2012.  Closer won "Single of the Year" at the 2014 Juno Awards.  The song was featured on the TV series "Glee" during its 82nd episode.  In 2013, it peaked at number one on "Billboard"' s Hot Dance Club Songs chart.  It also became their first single to chart on the "Billboard" Hot 100.  On April 20, 2013, 3600 vinyl copies of "Closer Remixed", including four more tracks than the digital EP, were exclusively released for Record Store Day 2013.  On July 4, 2013, "Closer" was certified platinum in Canada.

I'll Take the Blame: I'll Take the Blame is the second major EP released by indie rock/new wave/indie pop group Tegan and Sara.  The EP was first sold at shows during Tegan and Sara's fall 2008 tour of the United States.

Supporting paragraphs: Rain Parade Tegan and Sara
Answer: Tegan and Sara