Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lady Sings the Blues

I bought this video for a friend in South Africa, hoping to change the format from NTSC to PAL, but have learned that the cassette is copy-protected, and unable to do it. Since the cassette needed to be opened in order to determine whether or not it was copy-protected, I assume I cannot return it. So, this experience was not a favorable one, but it is not Amazon's fault, except in the fact that they do not offer this particular movie in a format that is accessible to South Africans.