Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Two equals four (or five)

This album proves that the genius for story-telling, verbal imagery and biting social observation didn't merely reside in the collaborative efforts of the entire Firesign troupe. Proctor and Bergman are deft commentators, skewering everything from our fascination with plastic to the disposable society that creates and throws away everything from light bulbs to celebrities. Spending time with the Theatre has always been akin to hanging out with the frat-brother that got the full ride to Harvard. At turns hilariously sophomoric, frighteningly insightful but always entertaining, this is classic Firesign. Enjoy.