Construct a 2-3 sentence summary of the provided excerpt.
The French Revolution began in 1789 and quickly turned into a ten year period of terror and instability in France.
The French Revolution was a significant event that started in 1789 and lasted for a decade. It caused a period of fear and uncertainty in the country.
Complete the following task based on the instruction and optional input provided.### Instruction:
Construct a 2-3 sentence summary of the provided excerpt.

### Input:
The French Revolution began in 1789 and quickly turned into a ten year period of terror and instability in France.

### Output:
The French Revolution was a significant event that started in 1789 and lasted for a decade. It caused a period of fear and uncertainty in the country.