Add OpenNLP maxent POS tag example to Readme

Change-Id: Iab04c0673baa15f3b5ae9a9af5428108cd134827
diff --git a/Readme.md b/Readme.md
index a6e54b5..1b0483f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -76,6 +76,12 @@
 3       Frankreich      _       _       NE      case=dat|number=sg|gender=neut  _       _       _       _
 ```
 
+### Tag with integrated OpenNLP POS tagger directly to a new KorAP-XML zip file
+
+```shell script
+java -jar ./app/build/libs/korapxml2conllu.jar -f zip -t opennlp:/usr/local/kl/korap/Ingestion/lib/models/opennlp/de-pos-maxent.bin /tmp/zca24.zip
+```
+
 ## Development and License
 
 **Author**: