Abstract
Fine-grained opinion analysis is one task in the field of sentiment analysis/opinion mining. This involves, among other things, detecting opinionated subparts of a text and linking targets of opinion and opinion holders together. In this work we present an environment for experimentation with the MPQA Opinion Corpus and a variety of linguistic analysis tools and target representations. We will use this to investigate quantitative and qualitative effects when using different types of interface representations to syntactic analysis.