Complex sentence: Blodwyn Pig were a British blues-rock group founded by guitarist/vocalist/songwriter Mick Abrahams, after he left Jethro Tull in 1968 due to a falling out with Tull leader Ian Anderson.
Split into simpler sentences: Blodwyn Pig were a British blues-rock group founded by Mick Abrahams after he left Jethro Tull in 1968. Abrahams had earlier had a falling out with Tull leader Ian Anderson.