Question: What is the name of this fourth studio album by an English rock band, released in May 1969, whose lyrics were adapted from Sonny Williamson's lyrics?
Sentence (from "Eyesight to the Blind"): "Eyesight to the Blind" is a 12-bar blues song written and recorded in 1951 by Sonny Boy Williamson II (Aleck "Rice" Miller).
Relevant evidence: Yes