5. The method of claim 1 , wherein, for each incongruous term pair (t x , tt), a semantic distance between the term t x and the term tt is greater than a threshold distance within the controlled vocabulary.
5. The method of claim 1 , wherein, for each incongruous term pair (t x , tt), a semantic distance between the term t x and the term tt is greater than a threshold distance within the controlled vocabulary. 6. The method of claim 5 , wherein the data structure comprising the incongruous term pairs (t x , tt) is formed by: determining a plurality of compound noun phrases within the controlled vocabulary, wherein each compound noun phrase comprises a first term and a second term, wherein the second term is a linguistic head of the first term; for each compound noun phrase of the plurality of compound noun phrases, determining the semantic distance between the second term and the first term; and for each compound noun phrase wherein the semantic distance between the second term and the first term is greater than the threshold distance, saving the compound noun phrase in the data structure as an incongruous term pair (t x , tt), wherein the second term is the term tt and the first term is the term t x .