Keyphrases
- semantic relations
- external knowledge
- background knowledge
- relevant concepts
- world knowledge
- concept learning
- knowledge base
- similarity relations
- neural network
- semantic network
- information retrieval
- conceptual graphs
- wordnet
- co occurrence
- keywords
- dependency relations
- ontological concepts
- human knowledge
- logical structure
- binary relations
- wikipedia articles
- temporal relations
- concept hierarchy
- automatic extraction
- knowledge structures
- knowledge sources