 "D. H. Lawrence" (with whitespaces between the individual words that form the full name), idiosyncratic orthographical spellings used for stylistic purposes (often referring to a single concept, e.g.an entertainment product title like ".hack//SIGN") and usage of non-standard punctuation (or non-standard usage "of" punctuation) in a text often fall under the remaining 5%.Another approach is to automatically learn a set of rules from a set of documents where the sentence breaks are pre-marked.