sentences:  "In 1939 half the owners and workers of small manufacturing plants were foreigners, many of them newly arrived Jewish refugees from Central Europe".Jewish cultural and religious organizations flourished in the cities; a Yiddish press and theatre opened in Buenos Aires, as well as a Jewish hospital and a number of Zionist organizations.The Zwi Migdal organization established in the 1860s in Buenos Aires operated an international network of pimps exploiting Jewish girls from Eastern Europe.