RSs are Ubiquitous Books at Amazon Movies at Netflix People at OkCupid Recommendation as Rating Prediction Rec:Users × Items→Ratings Predict unknown ratings f
Background Recommendation System Predict users potential interests from their rating/purchasing history Data Sparseness-The Bottleneck The lack of user-item rat
Motivation Types group entities to categories Entity types are important for various NLP tasks Question answering Relation extraction Relation extraction