WARNING:
The following files are required for the Stanford NLP Group Part-of-Speech tagger:
resources/wsj3t0-18-left3words/train-wsj-0-18.holder
resources/wsj3t0-18-left3words/train-wsj-0-18.holder.acls
resources/wsj3t0-18-left3words/train-wsj-0-18.holder.dict
resources/wsj3t0-18-left3words/train-wsj-0-18.holder.ex
resources/wsj3t0-18-left3words/train-wsj-0-18.holder.prob
resources/wsj3t0-18-left3words/train-wsj-0-18.holder.tags
Copy these files with the same directory structure as above to the same directory where your citespace.jar is located, then restart citespace.
These files are downloadable from http://nlp.stanford.edu/software/index.shtml, or download a local copy from http://cluster.cis.drexel.edu/~cchen/citespace/resources/wsj3t0-18-left3words.rar