15. The machine translation system of claim 13 , wherein the re-ranker is operative to re-rank the n-best list using one or more additional features based on known properties of noun phrases and prepositional phrases.
15. The machine translation system of claim 13 , wherein the re-ranker is operative to re-rank the n-best list using one or more additional features based on known properties of noun phrases and prepositional phrases. 17. The machine translation system of claim 15 , wherein the one or more additional features comprises using the web as a language model.