| 1 | A single spark can start a prairie fire. | |
| 2 | The flames of revolution are spreading far and wide. | |
| 3 | The single spark that started the prairie fire suggests the answer. | |
| 4 | As Mao Zedong famously said, "A single spark could set the prairie alight." | |
| 5 | That still leaves a huge reservoir for recruits, but they have been hard to spot in the uprisings sweeping the Arab world. |