Complex sentence: In 1982, she conceived of the idea for "The Ribbon" to equate with the practice of tying a string around one's finger to remember something by wrapping the Pentagon with pieces of cloth as a reminder that life is precious and nuclear war unthinkable.
Split into simpler sentences: In 1982, she conceived of the idea for "The Ribbon", to equate with the practice of tying a string around one's finger to remember something. Her inital plan was to wrap the Pentagon with pieces of cloth as a reminder that life is precious and nuclear war unthinkable.