Using the attached JSON of writing prompts, you should try to pick out 4 unique and intentionally vague single-word themes that apply to some portion of the list. They can range from common to uncommon words.
Then add 2 more single word divergent themes that are less related to the historic prompts and are somewhat different from the other 4 for a total of 6 words.
These 2 divergent themes give the user the option to steer away from existing themes.
Examples for the divergent themes could be the option to add a theme like technology when the other themes are related to beauty, or mortality when the other themes are very positive.