Task: Story Composition
Input (English): Premise: Ian wanted a pool. 
 Initial Context: But he didn't know how to swim. 
 Original Ending: So he decided to practice swimming at his friend's house. But he swam there so often that he didn't need his own pool. Ian was glad that he learned how to swim though. 
 New ending: So he decided to go swimming at his friend's house. But he swam there so often that he didn't need his own pool. Ian was glad that he was able to swim though. 
Output (English): he was an expert swimmer.