Nothing
Use Unicdoe character class table in isspace()
Some sort of index for allowing KWIC queries.
URL, twitter handling. Notes:
CoreNLP/src/edu/stanford/nlp/process/PTBLexer.flex
allowed: alphanumerics, the special characters "$-_.+!*'(),", and reserved characters used for their reserved purposes may be used unencoded within a URL.
reserved: ";", "/", "?", ":", "@", "=" and "&"
encode a byte: %XX (hex) UTF-8 allowed
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