1. Google n-Grams. https://books.google.com/ngrams/. Google n-Grams. https://books.google.com/ngrams/.
2. Netspeak. http://www.netspeak.org/. Netspeak. http://www.netspeak.org/.
3. Stanford coreNLP parser. http://nlp.stanford.edu/software/corenlp.shtml. Stanford coreNLP parser. http://nlp.stanford.edu/software/corenlp.shtml.
4. Web data: Amazon reviews. http://snap.stanford.edu/data/web-Amazon.html. Web data: Amazon reviews. http://snap.stanford.edu/data/web-Amazon.html.