4 The primary reasons for choosing this program were a) its non-commercial license, b) its portability to a wide variety of platforms, and c) a mature set of annotation features, such as possibility to create link attributes (used for coreference), mark overlapping elements, and assign multiple annotations of the same class to one token (which was heavily used by our experts for the cases when one sentiment statement was included into another opinion, e.g., She loves this ugly jacket).
working completely independently, one of the experts has annotated 78.8 percent of the full corpus, whereas another coder has labeled the complete dataset.