1. Topic: Opinion Extraction and Summarization

2. Opinion Extraction and Summarization What follows: perspective of Cardie, Riloff, Wiebe We can see similar themes in others’ work as well

3. OUTBREAK Disease: Victims: Location: Country: Status: Containment: Information Extraction from Text / bird flu / 36 commercial premises Canada confirmed avian flu poultry Fraser Valley poultry farms depopulation The Canadian Food Inspection Agency says ongoing surveillance efforts have led to the detection of bird flu on 36 commercial premises. The agency says it is continuing depopulation efforts on infected farms on a priority basis. After a brief lull, the avian flu is on the march again through Fraser Valley poultry farms.

4. Information Extraction of Events Extracting facts and entity relations associated with events of interest. Terrorist incidents: perpetrators, victims, physical targets, weapons, date, location Disease outbreaks: disease, organisms, victim, symptoms, location, country, date, containment measures Keywords and named entity recognition are not sufficient. Researchers have discovered how anthrax toxin destroys cells and rapidly causes death... Troops were vaccinated against anthrax, cholera, …

5. 3 chickens died from avian flu. Fact: DEATH Victim: 3 chickens Disease: avian flu 3 chickens died from avian flu. The birds were found in Canada. Event: Outbreak Victim: 3 chickens / the birds Disease: bird flu Country: Canada 3 chickens died from avian flu. SUBJ VP PP Syntactic Analysis Extraction Coreference Resolution Template Generation

6. Subjectivity: opinions, emotions, motivations, speculations, sentiments Information Extraction of –NL expressions –Components –Properties Angolans are terrified of the Marburg virus Source Attitude Target Negative Emotion Intensity: High Opinion Frame Source: Angolans Polarity: negative Attitude: emotion Intensity: high Target: Marburg virus

7. Fine-grained Opinions Australian press has launched a bitter attack on Italy after seeing their beloved Socceroos eliminated on a controversial late penalty. Italian coach Lippi has also been blasted for his comments after the game. In the opposite camp Lippi is preparing his side for the upcoming game with Ukraine. He hailed 10- man Italy's determination to beat Australia and said the penalty was rightly given. [Stoyanov & Cardie, 2006]

8. Fine-grained Opinion Extraction “The Australian Press launched a bitter attack on Italy” Opinion Frame Source: Australian Press Polarity: negative Attitude: sentiment Intensity: high Target: Italy

9. Opinion Summary Australian Press Italy Marcello Lippi penalty Socceroos

10. Summarization of Opinions + Events Summary Representation Direct Subjective Source: Polarity: Intensity: Direct Subjective Source: Polarity: Intensity: Opinion Frame Source: Polarity: Intensity: Disease Outbreak Victim: Location: Disease: Date: …