Given the following context:

"One of Us Must Know (Sooner or Later)"When Dylan arrived at the studio on January 25, 1966, he had yet to work out the lyrics and title for what was to become the closing track on Blonde on Blonde's first side. With Dylan piecing together the song's sections, and the chorus that gives the song its title only emerging on take five, the session stretched through the night and into the next morning. It was not until the fifteenth take that a full version was recorded. Dylan and the band persisted until they recorded take 24 which closed the session and made it onto the album four months later. Critic Jonathan Singer credits Griffin's piano for binding the song together: "At the chorus, Griffin unleashes a symphony; hammering his way up and down the keyboard, half Gershwin, half gospel, all heart. The follow-up, a killer left hand figure that links the chorus to the verse, releases none of the song's tension.""One of Us Must Know" is a straightforward account of a burned-out relationship. Dissecting what went wrong, the narrator takes a defensive attitude in a one-sided conversation with his former lover. As he presents his case in the opening verse, it appears he is incapable of either acknowledging his part or limiting the abuse: "I didn't mean to treat you so bad. You don't have to take it so personal. I didn't mean to make you so sad. You just happened to be there, that's all." "One of Us Must Know" was the first recording completed for Blonde on Blonde and the only one selected from the New York sessions. The song was released as the first single from the album on February 14, the same day Dylan began to record in Nashville. It failed to appear on the American charts, but reached number 33 in the UK.

answer the following question:

What is the name of the person that was responsible for the song structure of the song that reached number 33 in the UK? 

Dylan