Merge pull request #33 from openeventdata/paper

Paper

paper/paper.bib

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+%% This BibTeX bibliography file was created using BibDesk.
+%% http://bibdesk.sourceforge.net/
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+%% Created for John Beieler at 2016-10-23 17:47:58 -0400 
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+%% Saved with string encoding Unicode (UTF-8) 
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+@unpublished{tabari,
+	Author = {Philip A. Schrodt},
+	Date-Added = {2016-10-23 21:47:51 +0000},
+	Date-Modified = {2016-10-23 21:47:55 +0000},
+	Note = {Paper presented at the International Studies Association, Chicago, 21-24 February 2001},
+	Title = {Automated Coding of International Event Data Using Sparse Parsing Techniques},
+	Year = {2001}}
+
+@unpublished{cameo,
+	Author = {Deborah J. Gerner and Philip A. Schrodt and Omur Yilmaz and Rajaa Abu-Jabr},
+	Date-Added = {2016-10-23 21:47:14 +0000},
+	Date-Modified = {2016-10-23 21:47:14 +0000},
+	Note = {American Political Science Association, Boston, August 2002},
+	Title = {Conflict and Mediation Event Observations (CAMEO): A New Event Data Framework for the Analysis of Foreign Policy Interactions},
+	Year = {2001}}

paper/paper.md

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+  ---
+  title: 'PETRARCH2: Another Event Coding Program'
+  tags:
+    - event coding
+    - natural language processing
+    - computational linguistics
+  authors:
+   - name: Clayton Norris
+     orcid: 0000-0001-5907-757X
+     affiliation: 1
+   - name: Philip Schrodt
+     orcid: 0000-0003-3495-4198
+     affiliation: 2
+   - name: John Beieler
+     orcid: 0000-0001-7811-4399
+     affiliation: 3
+  affiliations:
+   - name: University of Chicago
+     index: 1
+   - name: Parus Analytics
+     index: 2
+   - name: Human Language Technology Center of Excellence<br />Johns Hopkins University
+     index: 3
+  date: 23 October 2016
+  bibliography: paper.bib
+  ---
+
+  # Summary
+
+  The PETRARCH2 coding program implements a new coding algorithm, based on a
+  syntactic constiuency parse, to extract who-did-what-to-whom political event data from
+  structured news stories. Events are coded according to the CAMEO [@cameo] coding
+  ontology. This software improves upon previous-generation coding software
+  such as TABARI [@tabari] by using a deep syntactic parse rather than shallow 
+  parsing.
+
+  At the level of assigning codes, PETRARCH2 is largely dictionary based, working from extensive 
+  dictionaries of verb phrases to identify the type of event, and noun phrases to
+  identify both the actor (generally a proper noun such as the name of a country or
+  leader) and agent (generally a common noun identifying a role such as "police" or
+  "protesters"). These dictionaries incorporate the synonym sets from WordNet, are
+  open source, and are included in the distribution.
+
+  PETRARCH2 has primarily been run using Treebank output from the Stanford CoreNLP
+  system. It can be integrated with other software on the https://github.com/openeventdata/ site
+  to handle either continuous near-real-time coding or batch coding, as well as 
+  auxiliary programs for geolocation and simple deduplication.