TS-ANNO: An Annotation Tool to Build, Annotate and Evaluate Text Simplification Corpora

We introduce TS-ANNO, an open-source web application for manual creation and for evaluation of parallel corpora for text simplification. TS-ANNO can be used for i) sentence-wise alignment, ii) rating alignment pairs (e.g., w.r.t. grammaticality, meaning preservation,...), iii) annotating alignment pairs w.r.t. simplification transformations (e.g., lexical substitution, sentence splitting, ...), and iv) manual simplification of complex documents. For evaluation, TS- ANNO calculates inter-annotator agreement of alignments i) and annotations ii).