sentences:  His parents were Polish Jewish immigrants from Congress Poland (then part of Russian Empire), who spoke mainly Yiddish.Jack was the fifth surviving son of Benjamin Warner (originally "Wonsal" or "Wonskolaser"), a cobbler from Krasnosielc, and his wife, the former Pearl Leah Eichelbaum.Following their marriage in 1876, the couple had three children in Poland, one of whom died at a young age.