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Please predict whether this patent is acceptable.PATENT ABSTRACT: A method and apparatus are provided for recommending concepts from a first concept set in response to user selection of a first concept Ci by performing a natural language processing (NLP) analysis comparison of the vector representations of a first concept set of candidate concepts and a second concept set of user-explored concepts to determine a similarity measure corresponding to each candidate concept, and to select therefrom one or more of the candidate concepts for display as recommended concepts which are related to the one or more user-explored concepts from the navigation history for the user based on the similarity measure for each candidate concept.