Complex sentence: The following month, she participated in the CIM conference in Buenos Aires, Argentina, and with Stevens presented a plea for the Pan-American Union to recommend that all member states enfranchise women as a means of promoting world peace.
Split into simpler sentences: The following month, she participated in the CIM conference in Buenos Aires, Argentina. She and Stevens presented a plea for the Pan-American Union to recommend that all member states enfranchise women as a means of promoting world peace.