7. An apparatus, comprising: one or more computer processors that execute: using an input sentence to extract an extracted example sentence from a set of example sentences according to a matching evaluation on a character block basis between the input sentence and the set of example sentences; selecting, as a reevaluation portion, a portion of the input sentence other than a portion that contributed to the matching evaluation for the extracting of the extracted example sentence; re-extracting another example sentence from the set of example sentences according to a re-evaluation of the matching using the reevaluation portion of the input sentence; and identifying example sentence segments for segments of the input sentence based upon candidate sentence segments according to the extracted and re-extracted example sentences.
7. An apparatus, comprising: one or more computer processors that execute: using an input sentence to extract an extracted example sentence from a set of example sentences according to a matching evaluation on a character block basis between the input sentence and the set of example sentences; selecting, as a reevaluation portion, a portion of the input sentence other than a portion that contributed to the matching evaluation for the extracting of the extracted example sentence; re-extracting another example sentence from the set of example sentences according to a re-evaluation of the matching using the reevaluation portion of the input sentence; and identifying example sentence segments for segments of the input sentence based upon candidate sentence segments according to the extracted and re-extracted example sentences. 9. The apparatus according to claim 7 , wherein the set of example sentences is obtained by retrieving example sentences using the input sentence as a retrieval condition.