15. The computer program product of claim 11 , wherein a concept dictionary dataset comprises concepts and associated word objects, wherein each concept in the concept dictionary dataset is a word or phrase, wherein said deriving the first combination comprises: said processor finding in the concept dictionary dataset an occurrence of each word object of the one or more word objects; and said processor locating in the concept dictionary dataset the concept associated with each word object whose occurrence was found in the concept dictionary dataset, wherein the first combination consists of the located concepts associated with each word object whose occurrence was found in the concept dictionary dataset.
11. A computer program product, comprising a computer readable hardware storage device having computer readable program code stored therein, said hardware storage device not being a signal, said program code containing instructions which, upon being executed by a processor of a computer system, implement a method for processing messages, said method comprising: said processor identifying an action to be subsequently performed on the message; in response to said identifying the action, said processor extracting one or more word objects from the message; said processor deriving a first combination of one or more concepts from the one or more word objects, wherein each concept of the one or more concepts is associated with at least one word object of the one or more word objects, and wherein each word object of the at least one word object is an instance of the associated concept; said processor determining a first interest value associated with the first combination; said processor determining that the first interest value is at least a specified first threshold value; and in response to said determining that the first interest value is at least the specified first threshold value, said processor updating a concept interest dataset, wherein the concept interest dataset prior to being updated comprises a plurality of combinations of at least one concept, wherein each concept of the at least one concept has been derived from a previous processing of messages, and wherein the updated concept interest dataset comprises the first combination and a cumulative interest value that encompasses the first interest value.