Abstract: A document mining method includes automatically parsing each sentence of a corpus of documents into constituents. If some of the constituents correspond to entities from a list of recognized entity types, a relation between those entities, the relation including the entities and a link between them, is automatically identified. If the relation is identified in a predetermined number of sentences of the corpus, a relation extraction rule is automatically created. The relation extraction rule is applicable to a document to enable automatic retrieval of information that corresponds to the relation from that document.