15. The non-transitory computer readable medium of claim 13 , further comprising instructions when executed by the processor cause the processor to: determine whether optical character recognition performed on a word is recognizable.
15. The non-transitory computer readable medium of claim 13 , further comprising instructions when executed by the processor cause the processor to: determine whether optical character recognition performed on a word is recognizable. 16. The non-transitory computer readable medium of claim 15 , further comprising instructions when executed by the processor cause the processor to: obtain, responsive to determining the optical character recognition performed on the word is not recognizable, a candidate clause in one of the plurality of documents with the available variation replaced with the variable, the candidate clause comprising a first word before the word and a second word after the word; and determine, responsive to at least one of the clause example and the variable comprising the first word, a third word and the second word in that sequence, the clause to be a candidate standard exact clause.