Complex sentence: The price controls were successful for six years when the system became no longer workable because the pegged price of gold was too low, runs on gold, the British pound, and the US dollar occurred, and France decided to withdraw from the pool.
Split into simpler sentences: The price controls were successful for six years when the system became no longer workable because the pegged price of gold was too low. Runs on gold, the British pound, and the US dollar occurred, and France decided to withdraw from the pool.