To implement this idea, source concepts (SC) and semantic relations (SR) are bound into one entity, since SR is mainly influenced by SC, not the destination concepts (DC).
if two entities, < SC, SR>, and DC have probabilities P(<SC, SR>) and P(DC), then their mutual information I(<SC, SR>, DC) is defined as: The MI between concepts in the ontology must be calculated before using the ontology as knowledge for disambiguating word senses.