I asked a question before about tokenization (getting the wrong end of the stick I believe.) I see now that Stanford NLP 4 does the job of splitting Contractions & Clitic pronouns - very well - much better than the 3.x version.
However I'm still short on how to get the new 4.x version to return the bigger tag set mentioned in Question 6 on the FAQ https://nlp.stanford.edu/software/spanish-faq.html
E.g. To differentiate between nc0s000 & nc0p000 (Singular and Pural Nouns)
Is the .ud tagger going to be made available in future releases?
As of 4.2, only UD models are available.