Question: Which group was formed first, I Mother Earth or Cherub?

Context paragraphs:
I Mother Earth: I Mother Earth, or IME, is a Canadian alternative rock band.  The band was at the peak of its popularity in the mid-to-late 1990s.  On January 24, 2012, the band ended an eight-year hiatus with an announcement on their official website.

Jagori Tanna: Jagori Tanna (born "Andrew Koshowski", in Hamilton, Ontario) is a Canadian musician.  Together with his brother, Christian Tanna, he formed I Mother Earth around 1990.  He wrote almost all of I Mother Earth's music, and produced much of it as well.  He won a Juno Award in 2000 for Best Recording Engineer (with Paul Northfield) for the band's singles "Summertime in the Void" and "When Did You Get Back From Mars?" .

Edwin (musician): Edwin (born Edwin Ghazal) is a Canadian alternative rock singer from Toronto.  He is the lead vocalist for successful Canadian rock band I Mother Earth and a solo artist.  He is also the lead singer for the Canadian supergroup Crash Karma.  In 2016, he reunited with I Mother Earth for a series of shows and a tour commemorating the 20th anniversary of their biggest commercial release, Scenery And Fish.

Pachamama Raymi: Pachamama Raymi (Quechua "Pachamama" Mother Earth, "raymi" feast, "Mother Earth feast") is a ceremony held annually in Ecuador and Peru.  In Ecuador the feast is celebrated in the Zamora-Chinchipe Province.  In Peru it takes place in the Ccatca District of the Cusco Region, Quispicanchi Province, on August 1.

Cherub (musical duo): Cherub, stylized as CHERUB, is an electro-indie duo from Nashville, Tennessee formed in 2010 consisting of Jordan Kelley and Jason Huber.  They are currently signed to Columbia Records.

Mother Earth (Within Temptation song): "Mother Earth" is the third single of Dutch symphonic metal band Within Temptation from their second studio album, Mother Earth.

BackHome: BackHome was a magazine that was created in 1990 as a competitor to "Mother Earth News" after the latter was taken over by a major publisher (and then, ultimately, Ogden Publications).  Richard Freudenberger is the co-founder of "BackHome".  Following the earlier, simpler, style of "Mother Earth News", it became a strong competitor in the homesteading and simple living tutorial and instructional print market.  The headquarters was in Flat Rock, North Carolina.  It was formerly based in Hendersonville, North Carolina.

International Mother Earth Day: International Mother Earth Day was established in 2009, by the General Assembly under Resolution A/RES/63/278.  The Resolution was introduced by The Plurinational State of Bolivia and endorsed by over 50 member states.  It recognizes that "the Earth and its ecosystems are our home" and that "it is necessary to promote harmony with nature and the Earth."  The term Mother Earth is used because it "reflects the interdependence that exists among human beings, other living species and the planet we all inhabit".  It is decided to designate April 22 as International Mother Earth Day.

Tracy Nelson/Mother Earth: Tracy Nelson/Mother Earth (also known as just Mother Earth) is an album that was released in 1972 by the blues rock group Mother Earth.  The band's fifth studio album, it was distributed by the label Reprise Records.  The release's title reflects the growing separation between performer Tracy Nelson and the rest of the band, who had grown into something of a mere backing vehicle for Nelson.

Christian Tanna: Christian Tanna (born Christian Koshowski in Hamilton, Ontario) is a Canadian musician.  He began playing drums in high school, and with his brother, Jagori Tanna, formed I Mother Earth in 1990.  Tanna played on 1993's "Dig", 1996's "Scenery and Fish", 1999's "Blue Green Orange", and 2003's "The Quicksilver Meat Dream".  He wrote all of I Mother Earth's lyrics, and has a distinct, psychedelic style of writing.

Supporting paragraphs: I Mother Earth Cherub (musical duo)
Answer: I Mother Earth