document: Hierarchical organization of unstructured consumer reviews In this paper , we propose to organize the aspects of a specific product into a hierarchy by simultaneously taking advantages of domain structure knowledge as well as consumer reviews . Based on the derived hierarchy , we generate a hierarchical organization of the consumer reviews based on various aspects of the product , and aggregate consumer opinions on the aspects . With such hierarchical organization , people can easily grasp the overview of consumer reviews and opinions on various aspects , as well as seek consumer reviews and opinions on any specific aspect by navigating through the hierarchy . We conduct evaluation on two product review data sets : Liu et al. 's data set containing 314 reviews for five products ( 2 ) , and our review corpus which is collected from forum Web sites containing 60,786 reviews for five popular products . The experimental results demonstrate the effectiveness of our approach .
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