  We introduce an entity-centric search engineCommentsRadarthatpairs entity
queries with articles and user opinions covering a widerange of topics from top
commented sites. The engine aggregatesarticles and comments for these articles,
extracts named entities,links them together and with knowledge base entries,
performssentiment analysis, and aggregates the results, aiming to mine
fortemporal trends and other insights. In this work, we present thegeneral
engine, discuss the models used for all steps of this pipeline,and introduce
several case studies that discover important insightsfrom online commenting
data.
