Given the task definition and input, reply with output. In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: Jethro Tull are an English progressive rock band from Blackpool. Formed in December 1967, the group originally included vocalist and flautist Ian Anderson, guitarist and backing vocalist Mick Abrahams, bassist Glenn Cornick and drummer Clive Bunker. After contributing to the band's debut album This Was, Abrahams left Jethro Tull in December 1968, citing disagreements with the band's "basic policies, both musically and otherwise". He was replaced before the end of the year by Martin Barre, after rehearsals and stand-in performances by David O'List and Tony Iommi. Keyboardist John Evan was added to the band's lineup in April 1970, after contributing to Benefit as a guest performer. By the end of the year, Cornick had left the band due to "musical differences", with Jeffrey Hammond-Hammond taking his place. Anderson was left as the sole original member of the group by May 1971, when Bunker also left due to their heavy touring schedule. He was replaced by Barriemore Barlow.
Link Information: Ian Scott Anderson (born 10 August 1947 Answer: Mick Abrahams,
Which original member of Jethro Tull was the youngest?