Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Why was this grouped with Pink Floyd's Roger Waters solo opera?

I did not notice the differences in the spelling of the last name Gilmore/Gilmour, until my brother, a die hard Pink Floyd fan, pointed it out. I had already purchased it as a Christmas present for him. I don't know why it was grouped with the Pink Floyd members solo material, when it wasn't even Rock 'n' Roll music or at least pop music, but Jazz. I don't think I'll return mine, it's too much trouble, but it's not my type of music. I'm sure others made the same mistaken assumptions. At worst, it will keep my listening experiences diverse.