We present an annotation tool for the extended textual coreference and the bridging anaphora in the Prague Dependency Treebank 2.0. We describe the way of helping the annotators by several useful features implemented in the annotation tool, such as a possibility to combine surface and deep syntactic representation of sentences during the annotation, an automatic maintaining of the coreferential chain, underlining candidates for antecedents, etc.
For studying differences among parallel annotations, the tool offers a simultaneous depiction of several annotations of the same data.