1. Extraction and Detection of Events
Extraction of events performed by GATE tools
Uses an entity-centric approach, based on named entity (ANNIE+) and term recognition (TermRaider)
Employ a combination of two (NLP-based) methods:
top-down (template-based recognition of pre-defined events)
bottom-up (open IE approach based on semantic clustering to find new unknown events)
Both approaches use ontology-based IE, detection and c;ustering of verbal relations, shallow parsing

2. Events are hierarchical
Rock am Ring 2011
Prodigy performance at Rock am Ring 2011
Man gets crushed to death during Prodigy performance at Rock am Ring 2011