Problem: Continue the following story.

Ryan has been the victim of domestic violence, but Robert has never experienced this. 
Here's how I want to continue it: Ryan is the survivor.

Problem: Continue the following story.

A capacitor was built by Joseph, and Adam couldn't get one to work, because 
Here's how I want to continue it: Joseph is a scientist.

Problem: Continue the following story.

Betty asked Natalie if she could borrow one of her yoga mats at yoga, since 
Here's how I want to continue it:
Natalie had brought two.