In this task, you are given books product reviews in English language. The goal is to classify the review as "POS" if the overall sentiment of the review is positive or as "NEG" if the overall sentiment of the review is negative.
One example: Hopeful for those who seek harmony in the world . I wouldn't recommend this to anyone who thinks that religious wars, repression of individual spirits or rape of the earth are good things. Those who seek peace, harmony, celebration of each of us and respect for our earth will find this hopeful
Solution is here: POS
Explanation: The overall sentiment of the review is positive as the reviewer mentions positive expressions such as 'hopeful', 'will find this helpful' etc.. Hence, the label is 'POS'.

Now, solve this: Crank-theory and work of an amateur . A poory written, racially charged work by a bitter, probably mentally ill schoolteacher that gives the illusion of having a "key" to historical development. In addition to the cycle of history thesis, he identifies eight civilizations and their birth to death cycle, Spengler points to a nation's "will" and race as the key to a "kultur's" success. This is the sort of crank theory that held an appeal to National Socialists and amateur history buffs for whom decline mythology holds an attraction-- facts be damned. Interesting as an historical footnote but dismissed by anyone with a serious foundation in history and historical analysis.
Solution:
NEG