Question: What is the name of the lead singer of an Australian folk group, who later left to become a solo artist?

Context paragraphs:
The Silkie: The Silkie were an English folk music group.  Their name was derived from an Orcadian song "The Great Silkie of Sule Skerry", which they sometimes performed.  They were briefly considered to be the English equivalent of Peter, Paul and Mary, with their common repertoire of Bob Dylan songs, and the original Australian folk group, The Seekers.

Along the Road to Gundagai: "Along the Road to Gundagai" is an Australian folk song written by Jack O'Hagan in 1922 and was first recorded by Peter Dawson in 1924, O'Hagan performed his own version later that year.  It is well-known among Australians, and one of a small number of pieces which are considered to be Australian folk tunes. Gundagai is a rural town of New South Wales.  In May 2001 the Australasian Performing Right Association (APRA), as part of its 75th Anniversary celebrations, named "Along the Road to Gundagai" as one of its Top 30 Australian songs of all time.  It was used as the theme to the "Dad and Dave" radio show.

Judith Durham: Judith Mavis Durham (born Judith Mavis Cock; 3 July 1943) is an Australian singer and musician who became the lead singer for the Australian popular folk music group The Seekers in 1963.  The group subsequently became the first Australian pop music group to achieve major chart and sales success in the United Kingdom and the United States, and have sold over 50 million records worldwide.  Durham left the group in mid-1968 to pursue her solo career.  In 1993, Durham began to make sporadic recordings and performances with The Seekers, though she remains primarily a solo performer.

The Seekers discography: The Seekers were an Australian folk music group formed in 1962 consisting of Athol Guy, Keith Potger, Bruce Woodley and Judith Durham.

Caught in the Act (Redgum album): Caught in the Act is the fourth album by Australian folk group Redgum, released in 1983 on Epic Records.  It was the only full-length live album they released.  The title is taken from the sixth track, which was also featured on "Brown Rice and Kerosine".

I Was Only Nineteen: "Only Nineteen", "I Was Only Nineteen" or "A Walk in the Light Green" is the most widely recognised song by Australian folk group Redgum.  The song was released in March 1983 as a single, which hit number one on the national Kent Music Report Singles Chart for two weeks.  It was also recorded for Redgum's live album "Caught in the Act" (Epic Records) released in June, which stayed in the top forty of the Kent Music Report Albums Chart for four months.  Royalties for the song go to the Vietnam Veterans Association of Australia.  It is in the Australasian Performing Right Association's Top 30 Australian Songs of all time.

Australian Folk Songs: Australian Folk Songs (Decca DL 8749) is a 1958 album by Burl Ives.  During his visit to Australia in 1952, invited there by the Australia Broadcasting Commission, Ives met the Reverend Percy Jones, a professor of music at the University of Melbourne.  The two men compiled a book of Australian folk songs and Ives recorded an album, "collected and arranged" by Jones, which were later released in the United States and elsewhere as "Australian Folk Songs".

Lindy Vopnfjörð: Lindy Vopnfjörð, previously credited as Lindy, is a Canadian singer-songwriter, who has performed both as a solo artist and as a member of several bands.  After singing in an Icelandic folk group as a child, he co-founded the folk-rock group Northern Junk with his brother in the early 1990s, developing a following in Victoria, B.C. He later released several solo albums while living in Toronto, and also was a member of the indie rock band Major Maker, whose single "Rollercoaster" charted on Billboard's Canadian Hot 100 chart.  His 2013 solo album, "Young Waverer", had several singles chart on CBC Radio's "Radio 2 Top 20" and "R3-30" charts.  Currently based in Hamilton, Ontario, as of 2014 he continues to tour and perform live.

John Schumann and the Vagabond Crew: John Schumann and the Vagabond Crew is an Australian folk group formed in Adelaide in 2005.  The band's name is taken from a line in Henry Lawson's poem "Knocking Around".  Since it was founded a number of Australian musicians have been involved.  The formation of the group marked the return of John Schumann, former Redgum frontman to regular performances and recording.

Suzie Dickinson: Suzie Dickinson is an Australian musician and songwriter.  Originating from Melbourne, she was the lead singer and guitarist in the folk band Banshee, which was critically acclaimed for its original arrangements of American, Irish, English and Australian folk music and lilting, imaginative vocal harmonies.  During this time Dickinson won two of Melbourne's "Free Entertainment in the Parks" awards for Most Popular Female Vocalist and Most Popular Female Folk Musician.  Banshee was a regular guest on Shirley Strachan's TV show "Shirl's Neighbourhood".

Supporting paragraphs: The Seekers discography Judith Durham
Answer: Judith Durham