Complex sentence: Hirsch Janow (c.1750--Nov.13,1785) was a Polish rabbi, who, on account of his great keenness in Talmudical discussions, was commonly called "Hirsch Ḥarif" (the acute).
Split into simpler sentences: Hirsch Janow (c.1750--Nov.13,1785) was a Polish. On account of his great keenness in Talmudical discussions he was commonly called "Hirsch Ḥarif" (the acute).