Complex sentence: Genealogy, as practiced by family historians, has as its goal the reconstruction of familial relationships, and as such, well conducted geneological research may form the basis of a prosopography, but the goals of prosopgraphical research are much wider.
Split into simpler sentences: Genealogy, as practiced by family historians, has as it goal the reconstruction of familial relationships. As such, well conducted geneological research may form the basis of a prosopography, but prosopgraphical research's goals are much wider.