AnnotateText.java throws an exception

[rezacsedu]

AnnotateText.java execution throws an exception. The log is given below:

java.io.IOException: Server returned HTTP response code: 401 for URL: http://data.bioontology.org/annotator?text=Melanoma+is+a+malignant+tumor+of+melanocytes+which+are+found+predominantly+in+skin+but+also+in+the+bowel+and+the+eye.
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.get(AnnotateText.java:101)
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.main(AnnotateText.java:30)
com.fasterxml.jackson.databind.JsonMappingException: No content to map due to end-of-input
at [Source: ; line: 1, column: 0]
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:270)
at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:3854)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3799)
at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:2397)
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.jsonToNode(AnnotateText.java:79)
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.main(AnnotateText.java:30)
Exception in thread "main" java.lang.NullPointerException
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.printAnnotations(AnnotateText.java:52)
at org.fit.vocabulary.neologism.OntologyRecommender.LOV.AnnotateText.main(AnnotateText.java:31)