<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_stories(label_type):
 """ Returns a list of the stories in the Na corpus. """


    prefixes = get_story_prefixes(label_type)
    texts = list(set([prefix.split(".")[0].split("/")[1] for prefix in prefixes]))
    return texts