文摘
This contribution introduces a new corpus of a German Media Response Analysis called the pressrelations dataset which can be used in several tasks of Opinion Mining: Sentiment Analysis, Opinion Extraction and the determination of viewpoints. Professional Media Analysts created a corpus of 617 documents which contains 1,521 statements. The statements are annotated with a tonality (positive, neutral, negative) and two different viewpoints. In our experiments, we perform sentiment classifications by machine learning techniques which are based on different methods to calculate tonality.