September 25, 2017 weblog
University team works on extract system to help keep tabs on civilians killed by police
(Tech Xplore)—Incidents of people who died during police encounters from news reports can be read, so to speak, by an AI system.
Shubham Sharma in International Business Times and several other sites have reported on the system developed by University of Massachusetts Amherst researchers, and the system can curate a database of police encounters by reading from news reports.
Matt Reynolds in New Scientist aptly said it was "a system that automatically scrapes news reports for mentions of police shootings."
The team wrote a paper (Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing) about their work, "Identifying civilians killed by police with distantly supervised entity-event extraction."
Authors are Katherine Keith, Abram Handler, Michael Pinkham, Cara Magliozzi, Joshua McDuffie and Brendan O'Connor.
How they developed the system: A corpus of news reports created the database. Their work involved first using keywords like 'officer', 'cop', 'shot', 'died' to gather Google News articles.
"We download a collection of web news articles by continually querying Google News throughout 2016 with lists of police keywords (i.e police, officer, cop etc.) and fatality-related keywords (i.e. kill, shot, murder etc.)."
The information was processed to avoid duplication and general mistakes, added Sharma.
The results, said the authors, indicated their model was better than existing computational methods to extract names of people killed by police.
(Sharma remarked that while not extremely accurate, good enough "to prove the viability of the prospect where an AI could offer a faster approach to create a massive, unambiguous database.")
The authors stated that while they made progress on the application, more work was required "for accuracy to be high enough to be useful for practitioners."
(Obviously, compiling lists out of manually performed news analysis would be laborious.)
"We propose to help automate this process by extracting the names of persons killed by police from event descriptions in news articles."
This is one of three projects under a lab umbrella. The SLANG Lab, College of Information and Computer Sciences, University of Massachusetts Amherst, takes up the challenge of a question, What can statistical text analysis tell us about society? The SLANG Lab (Statistical Social Language Analysis) is directed by Prof. O'Connor.
Their focus is on developing "natural language processing, machine learning, and data analysis tools to improve scientific investigation about political and social phenomena. For example, we analyze political events in news articles, and sentiment in social media."
The authors wrote on the SLANG Lab site about this particular effort:
Reynolds reported that O'Conner was interested in pulling in more data from more sources. "O'Connor is hoping to improve the results by feeding the algorithm a greater range of news sites and perhaps even social media data."
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