Information: - Rodents (from Latin "rodere", "to gnaw") are mammals of the order Rodentia, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents; they are found in vast numbers on all continents except Antarctica. They are the most diversified mammalian order and live in a variety of terrestrial habitats, including human-made environments. - Agnotocastor is an extinct member of the beaver family Castoridae . Unlike its modern relative , this species took the place of muskrats in the rivers of North America during the Oligocene epoch . - The family Castoridae contains the two living species of beavers and their fossil relatives. This was once a highly diverse group of rodents, but is now restricted to a single genus, "Castor". - The beaver (genus Castor) is a large, primarily nocturnal, semiaquatic rodent. "Castor" includes two extant species, the North American beaver ("Castor canadensis") (native to North America) and Eurasian beaver ("Castor fiber") (Eurasia). Beavers are known for building dams, canals, and lodges (homes). They are the second-largest rodent in the world (after the capybara). Their colonies create one or more dams to provide still, deep water to protect against predators, and to float food and building material. The North American beaver population was once more than 60 million, but as of 1988 was 612 million. This population decline is the result of extensive hunting for fur, for glands used as medicine and perfume, and because the beavers' harvesting of trees and flooding of waterways may interfere with other land uses. What object entity has the relation of 'taxon rank' with the subject 'agnotocastor'? Choices: - family - genus - group - order - species - variety
genus
*Question*
Information: - '' Southern Cross '' is a song written by Stephen Stills , Rick Curtis and Michael Curtis and performed by the rock band Crosby , Stills & Nash . It was featured on the band 's Daylight Again album and was released as a single in September 1982 . Stephen Stills sings lead vocals throughout , with Graham Nash joining the second verse . Because David Crosby did not rejoin the band until the album was already underway , his vocals are not featured on the album version of the song , although he did appear in the video and subsequently sang the song with the group in live performances . The single was a respectable success on the charts , reaching # 18 on the Billboard Hot 100 for three weeks in late November and early December 1982 . The song is about a man who sails the Pacific following a failed love affair . During the voyage , the singer takes comfort in sailing ( '' We got 80 feet of waterline . / Nicely making way . '' ) , in the beauty of the sea , and particularly in the Southern Cross , a constellation by which sailors in the Southern Hemisphere have traditionally navigated ( the Southern Cross is not visible from most of the Northern hemisphere , the more tropical latitudes being the exception ) . But his final consolation is music ( '' I have my ship / And all her flags are a flyin ' / She is all that I have left / And music is her name . '' ) . The video for the song , which got heavy play during the early years of the MTV and VH1 cable networks , featured Stephen Stills sailing a large boat ( called Southern Cross ) , intercut with images of the band singing . Southern Cross is based on the song '' Seven League Boots '' by Rick and Michael Curtis . Stills explained , '' The Curtis Brothers brought a wonderful song called ' Seven League Boots , ' but it drifted around too much . I rewrote a new set of words and added a different chorus , a story about a long boat trip I took after my divorce . It 's about using the power of the universe to heal your wounds . Once again , I was given somebody 's gem... - Buffalo Springfield was an American-Canadian rock band, formed in Los Angeles in 1966. Their original lineup included Stephen Stills (guitar, keyboards, vocals), Dewey Martin (drums, vocals), Bruce Palmer (electric bass), Richie Furay (guitar, vocals), and Neil Young (guitar, harmonica, piano, vocals). Pioneering the folk rock genre, Buffalo Springfield, along with the Byrds, combined elements of folk and country music with British invasion influences into their early works. Their second studio album, "Buffalo Springfield Again", marked their progression to psychedelia and hard rock. - "Wasted on the Way" is a 1982 song by American folk rock band Crosby, Stills & Nash, featuring harmony vocals by Timothy B. Schmit. It was their first top 10 hit in five years, and peaked at #9 on the "Billboard" Hot 100 singles charts in August 1982. On the Adult Contemporary chart, "Wasted on the Way", was the group's biggest hit on the chart, peaking at number two for five weeks. It appeared on the band's 1982 album "Daylight Again". The B-side was the David Crosby composition "Delta". - The Hollies are an English pop/rock group best known for their pioneering and distinctive three-part vocal harmony style. The Hollies became one of the leading British groups of the 1960s (231 weeks on the UK singles charts during the 1960s; the 9th highest of any artist of the decade) and into the mid 1970s. It was formed by Allan Clarke and Graham Nash in 1962 as a Merseybeat type music group in Manchester, although some of the band members came from towns north of there. Graham Nash left the group in 1968 to form the supergroup Crosby, Stills & Nash. - Daylight Again is the seventh album by Crosby, Stills & Nash, and their fourth studio album comprising original material. It peaked at #8 on the "Billboard" Top Pop Albums chart, the final time the band has made the top ten to date. Three singles were released from the album, all making the "Billboard" Hot 100: "Wasted on the Way" peaked at #9, "Southern Cross" at #18, and "Too Much Love to Hide" at #69. It was certified platinum by the RIAA with sales of 1,850,000. - Singer-songwriters are musicians who write, compose, and perform their own musical material, including lyrics and melodies. - Stephen Arthur Stills (born January 3, 1945) is an American musician and multi-instrumentalist best known for his work with Buffalo Springfield and Crosby, Stills, Nash & Young. - Graham William Nash, OBE (born 2 February 1942) is an English singer-songwriter and musician. He is known for his light tenor voice and for his songwriting contributions as a member of the English pop group The Hollies and the folk-rock supergroup Crosby, Stills & Nash. Nash became an American citizen on 14 August 1978 and holds dual citizenship of the United Kingdom and United States. What object entity has the relation of 'genre' with the subject 'southern cross '? Choices: - adult - album - british invasion - folk rock - love - musical - pop - rock - song
**Answer**
folk rock