 "Nearly every Jew that was rescued, was rescued by the cooperative efforts of dozen or more people," as confirmed also by the Polish-Jewish historian Szymon Datner.Paulsson notes that during the six years of wartime and occupation, the average Jew sheltered by the Poles had three or four sets of false documents and faced recognition as a Jew multiple times.Datner explains also that hiding a Jew lasted often for several years thus increasing the risk involved for each Christian family exponentially.