1. A method for summarizing relevance of a document to a conceptual query, the method comprising: receiving the conceptual query, the conceptual query comprising one or more concepts in a concept graph; accessing concepts extracted from the document, the concepts extracted from the document based on one or more differential tests performed on portions of text in the document and at least a subset of concepts in the concept graph; computing a degree to which the conceptual query is related to each of the extracted concepts, the computing responsive to a metric that measures a relevance between the one or more concepts in the conceptual query and the each of the extracted concepts, the computing comprising using a transition probability matrix to perform a weighting of each link in the concept graph that connects the one or more concepts in the conceptual query to the extracted concepts; creating a summary by selecting a threshold number of the extracted concepts having a greatest degree of relation to the conceptual query; and outputting the summary including the selected threshold number of extracted concepts.