In ancient Gk this adj. took the dative or genitive depending on meaning ("responsible for" + genitive, LJSM, 1871b), whereas in modern Gk there is a prepositional phrase that follows. While this point probably won't interest many learners, it might be of interest to those who come to modern Gk from ancient. Horrocks (Greek: A History of Its Language and Speakers) discusses the related shift to prepositions with accusative as default case on pp. 284-85.