"Later they watched television."
Translation:Posteriormente vieron televisión.
"Kim Kardashian a quien cada vez se le nota más su embarazo, fue fotografiada a su llegada al aeropuerto de París, Francia. POSTERIORMENTE, la socialité se reunió con su pareja Kanye West para disfrutar [regular AR verb, meaning: to enjoy] de la cocina francesa en el restaurante Ferdi." from the on-line edition of People magazine (Spanish edition) 4/4/13 (Hey, this is a real word. I thought it sounded so academic when I saw first saw it on Duolingo). My translation: Kim Kardashian who looks more preganant every time we see her, was photographed leaving the Paris, France, airport. Later the socialite was reunited with her partner Kanye West and enjoyed French food at the restaurent, Ferdi.
I think the problem comes from the fact that "posterior" is an adjective, whereas what is needed here is an adverb, "posteriormente". In English, "later" can be either an adverb OR and adjective. So "later" will need to be translated differently depending on it's role in the English sentence.