4. Entity and Relationship Discovery
Entity Uncertainty and Semantic Integration: Developing a robust and efficient semantic integration solution to the problem of entity uncertainty (mention matching). Entity and Relationship Generation: Group matched mentions from entities; develop methods to extract relevant entity attributes. Temporal Aspects and Entity and Relationship Maintenance: Maintain the extracted entity-relationship graph over time, as the underlying raw data changes (e.g., part of the data is deleted, modified, or new data is added).