Complex sentence: Weiner is considered to be one of the pioneers of contemporary Jewish genealogy and is described as a trail-blazing, highly-respected guide and leading authority on archival holdings and resources in pre-war Belarus, Lithuania, Moldova, Poland and Ukraine.
Split into simpler sentences: Weiner is considered to be one of the pioneers of contemporary Jewish genealogy. She is described as a trail-blazing, highly-respected guide and leading authority on archival holdings and resources in pre-war Belarus, Lithuania, Moldova, Poland and Ukraine.