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+Deceptive Opinion Spam Corpus v1.4
+==================================
+
+Overview
+--------
+
+This corpus consists of truthful and deceptive hotel reviews of 20 Chicago
+hotels. The data is described in two papers according to the sentiment of the
+review. In particular, we discuss positive sentiment reviews in [1] and negative
+sentiment reviews in [2].
+
+While we have tried to maintain consistent data preprocessing procedures across
+the data, there *are* differences which are explained in more detail in the
+associated papers. Please see those papers for specific details.  
+
+This corpus contains:
+
+* 400 truthful positive reviews from TripAdvisor (described in [1])
+* 400 deceptive positive reviews from Mechanical Turk (described in [1])
+* 400 truthful negative reviews from Expedia, Hotels.com, Orbitz, Priceline,
+  TripAdvisor and Yelp (described in [2])
+* 400 deceptive negative reviews from Mechanical Turk (described in [2])
+
+Each of the above datasets consist of 20 reviews for each of the 20 most popular
+Chicago hotels (see [1] for more details). The files are named according to the
+following conventions:
+
+* Directories prefixed with `fold` correspond to a single fold from the
+  cross-validation experiments reported in [1] and [2].
+
+* Files are named according to the format `%c_%h_%i.txt`, where:
+
+    * %c denotes the class: (t)ruthful or (d)eceptive
+
+    * %h denotes the hotel:
+
+        * affinia: Affinia Chicago (now MileNorth, A Chicago Hotel)
+        * allegro: Hotel Allegro Chicago - a Kimpton Hotel
+        * amalfi: Amalfi Hotel Chicago
+        * ambassador: Ambassador East Hotel (now PUBLIC Chicago)
+        * conrad: Conrad Chicago
+        * fairmont: Fairmont Chicago Millennium Park
+        * hardrock: Hard Rock Hotel Chicago
+        * hilton: Hilton Chicago
+        * homewood: Homewood Suites by Hilton Chicago Downtown
+        * hyatt: Hyatt Regency Chicago
+        * intercontinental: InterContinental Chicago
+        * james: James Chicago
+        * knickerbocker: Millennium Knickerbocker Hotel Chicago
+        * monaco: Hotel Monaco Chicago - a Kimpton Hotel
+        * omni: Omni Chicago Hotel
+        * palmer: The Palmer House Hilton
+        * sheraton: Sheraton Chicago Hotel and Towers
+        * sofitel: Sofitel Chicago Water Tower
+        * swissotel: Swissotel Chicago
+        * talbott: The Talbott Hotel
+
+    * %i serves as a counter to make the filename unique
+
+Questions
+---------
+
+Please direct questions to Myle Ott (<myleott@cs.cornell.edu>)
+
+References
+----------
+
+[1] M. Ott, Y. Choi, C. Cardie, and J.T. Hancock. 2011. Finding Deceptive
+Opinion Spam by Any Stretch of the Imagination. In Proceedings of the 49th
+Annual Meeting of the Association for Computational Linguistics: Human Language
+Technologies.
+
+[2] M. Ott, C. Cardie, and J.T. Hancock. 2013. Negative Deceptive Opinion Spam.
+In Proceedings of the 2013 Conference of the North American Chapter of the
+Association for Computational Linguistics: Human Language Technologies.
+
+License
+-------
+
+This work is licensed under the Creative Commons
+Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of
+this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a
+letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View,
+California, 94041, USA.
+
+If you use any of this data in your work, please cite the appropriate associated
+paper (described above).