Complex sentence: When Rabbi Yosef Yitzchok Schneersohn passed away in 1950, and his son-in-law, Rabbi Menachem M. Schneerson soon became the seventh Rebbe, followers soon hoped that he would be the Messiah.
Split into simpler sentences: When Rabbi Yosef Yitzchok Schneersohn passed away in 1950, and his son-in-law, Rabbi Menachem M. Schneerson soon became the seventh Rebbe. Followers soon hoped that he would be the Messiah.