Since we do not have (morpho-)syntactic gold standard annotations for this release, we post-processed the automatic system output to improve its usability, but without actually changing or correcting it.
following the idea of a silver-standard, we introduced additional confidence estimations as meta annotations for individual predictions based on the agreement between different systems (see Figure 2a for an example of trees predicted by three different parsing systems for the same sentence and Figure 2b for corresponding global confidence estimations).