Answer the question at the end by quoting:

N.E.R.D (stylized as N*E*R*D, a backronym of No-one Ever Really Dies) is an American hip hop and rock band, formed in Virginia Beach, Virginia in 1999. Pharrell Williams and Chad Hugo were signed by Teddy Riley to Virgin Records as a duo, The Neptunes. After producing songs for several artists throughout the late 1990s and early 2000s, the production duo formed the band with Shay Haley as a side project of The Neptunes in 1999.
In 2005, N.E.R.D ended their contract with Virgin Records over a label dispute and the band disbanded. While touring, the band became "hooked" on the energy from their fans, which led them to begin recording their third studio album, spending their own money while still unsigned. Williams and Hugo later established Star Trak Entertainment, a subsidiary of Interscope Records. In March 2008, the band performed at South by Southwest in Austin, Texas. While there they filmed a PSA for Rock the Vote saying why they thought voting was important and the issues they cared about that election year.  From April to June 2008, the band toured with Kanye West as an opening act along with Rihanna and Lupe Fiasco as part of the Glow in the Dark Tour. On June 13, they gave an energetic performance at the Isle of Wight festival, however they almost missed their scheduled show because they didn't know where the island was. On June 25, they performed in front of 40,000 people at the Isle of MTV 2008 at the Floriana granaries, Malta with free admission. On August 9, 2008, the band played at the Way Out West music festival held in the city park of Gothenburg, Sweden. In September 2008, N.E.R.D performed to a sold-out crowd at the House of Blues in Chicago, and brought special guest Bad Brains onstage.  N.E.R.D released their third studio album, Seeing Sounds in June 2008. The first single off the album, titled "Everyone Nose (All the Girls Standing in the Line for the Bathroom)", was first mentioned on their Billionaire Boys Club blog in January 2008. The second single off the album, titled "Spaz", was used in a TV commercial for the Microsoft Zune.  A song entitled "Soldier" featuring Santigold and Lil Wayne was featured on the soundtrack of the teen drama 90210.  The group toured with American rock band, Linkin Park on the European leg of their Projekt Revolution tour in 2008 with artists like HIM, The Used and Jay-Z. The group also played at the National Bowl, Milton Keynes before the recording of Road to Revolution by Linkin Park.

Where there any other singles released?

A song entitled "Soldier" featuring Santigold and Lil Wayne was featured on the soundtrack of the teen drama 90210.



Answer the question at the end by quoting:

Robert Dennis Crumb (; born August 30, 1943) is an American cartoonist and musician who often signs his work R. Crumb. His work displays a nostalgia for American folk culture of the late 19th and early 20th centuries, and satire of contemporary American culture. Crumb is a prolific artist and contributed to many of the seminal works of the underground comix movement in the 1960s, including being a founder of the first successful underground comix publication, Zap Comix, contributing to all 16 issues. He was additionally contributing to the East Village Other and many other publications, including a variety of one-off and anthology comics.
In January 1967 Crumb came across two friends in a bar who were about to leave for San Francisco; Crumb was interested in the work of San Francisco-based psychedelic poster artists, and on a whim asked if he could join them. There, he contributed upbeat LSD-inspired countercultural work to underground newspapers. The work was popular, and Crumb was flooded with requests, including to illustrate a full issue of Philadelphia's Yarrowstalks.  Independent publisher Don Donahue invited Crumb to make a comic book; Crumb drew up two issues of Zap Comix, and Donahue published the first in February 1968 under the publisher name Apex Novelties. Crumb had difficulty at first finding retailers who would stock it, and at first his wife took to selling the first run herself out of a baby carriage.  Crumb met cartoonist S. Clay Wilson, an art school graduate who saw himself as a rebel against middle-class American values and whose comics were violent and grotesque. Wilson's attitude inspired Crumb to give up the idea of the cartoonist-as-entertainer and to focus on comics as open, uncensored self-expression; in particular, his work soon became sexually explicit, as in the pornographic Snatch he and Wilson produced late in 1968.  The second issue of Zap appeared in June with contributions from Wilson and poster artists Victor Moscoso and Rick Griffin. In December, Donahue published the still-unreleased issue as #0 and a new third issue with Gilbert Shelton joining the roster of regulars. Zap was financially successful, and developed a market for underground comix.  Crumb was a prolific cartoonist in the late 1960s and early 1970s; at his peak point of output he produced 320 pages over two years. He produced much of his best-known work then, including his Keep on Truckin' strip, and strips featuring characters such as the bohemian Fritz the Cat, spiritual guru Mr. Natural, and oversexed African-American stereotype Angelfood McSpade. During this period, he launched a series of solo titles, including Despair, Uneeda (both published by Print Mint in 1969), Big Ass Comics, R. Crumb's Comics and Stories, Motor City Comics (all published by Rip Off Press in 1969), Home Grown Funnies (Kitchen Sink Press, 1971) and Hytone Comix (Apex Novelties, 1971), in addition to founding the pornographic anthologies Jiz and Snatch (both Apex Novelties, 1969).

what were these best known works?
Home Grown Funnies (Kitchen Sink Press, 1971) and Hytone Comix (Apex Novelties, 1971), in addition to founding the pornographic anthologies Jiz and Snatch (both Apex Novelties, 1969).