Problem: Continue the following story.

Ian knew more about the rules of professional hockey than Nick because 
Here's how I want to continue it: Ian liked watching winter sports.

Problem: Continue the following story.

Brian's rabbit was faster than Kenneth's rabbit in the race because 
Here's how I want to continue it: Kenneth fed their rabbits worse food.

Problem: Continue the following story.

To kill the octopus, the fisherman used a spear instead of the knife. The 
Here's how I want to continue it:
spear was deadlier.