#1535 - Export to CoNLL 2012 format has duplicate (V*) tags
#1535 - Export to CoNLL 2012 format has duplicate (V*) tags

- Upgrade to DKPro Core 2.1.0 for the required fixes to the CoNLL 2012 reader/writer

webanno/webanno,webanno/webanno,webanno/webanno,webanno/webanno