Task: Story Composition
Input (English): Premise: A man wanted to challenge himself. 
 Initial Context: He thought about difficult things to do that are fun. 
 Original Ending: He also desired something adventurous. He decided to climb a mountain. He climbed a mountain and felt like he fulfilled a dream. 
 New ending: He then desired to do something adventurous. He decided to climb a mountain. He climbed a mountain and felt like he could quit his exercise regime. 
Output (English): He decided to sign up for and exercise regime.