Complex sentence: In the 1990s, however, perhaps because of developments in computing, and particularly in database software, prosopography experienced a revival and the'new prosopography' is now clearly established as an important approach in historical research.
Split into simpler sentences: In the 1990s, however, perhaps because of developments in computing, and particularly in database software, prosopography was revived. The'new prosopography' has since become clearly established as an important approach in historical research.