How can I obtain just the results of the POS tagger for each word in a sentence?
You can use the -outputFormat wordsAndTags option. Note: if you want to tag a lot of text, it’d be much faster to use a dedicated POS tagger (such as ours or someone else’s), since this option has the parser parse the sentences and just not print the other information. There isn’t a separate included tagger; the parser does POS tagging as part of parsing.
