Complex sentence: In 1971, Chile's newly elected Socialist president Salvador Allende confiscated the Chuquicamata mine from Anaconda--at one stroke, stripping Anaconda of two-thirds of its copper production.
Split into simpler sentences: In 1971, Chile's newly elected Socialist president Salvador Allende confiscated the Chuquicamata mine from Anaconda. Anaconda lost two-thirds of its copper production.