18. The system recited in claim 16 wherein the parallel document engine further comprises a document classification module configured to determine whether the number of the source sentences aligned to the one or more target sentences satisfies a threshold associated with monotone sentences.
16. The system recited in claim 15 wherein the parallel document engine further comprises a sentence analysis module configured to select the one of the one or more target documents according to a number of the source sentences within the source document aligned to the one or more target sentences.