1. The clash of innovation and regulation has always been with us.

2. What we have is a clash of supply and demand.

3. Much of the clash was captured on video and posted online.

4. Thursday night sparked a clash that led to several arrests.

5. Inside the Republican Party, it also has been a clash of consultants.

6. If he does, the clash will be monumental.

7. When convenience and excellence clash, the latter is rarely the winner.

8. There was no clash, and most workers had since returned to the factory premises, Xinhua said.

9. The clash over wet wipes marked one of the more surprising fights.

10. That clash left four dead and at least 15 wounded, police said.