I have the following documents: 
'fax modem card sell mail',
'run server server install run add',
'live part lead wait important remember judge judge guess close situation listen statement sense regard passage remember letter church people body talk work translation lack concern make sick point throw faith faith catch meaning offer explanation fire cold make aware child eternal',
'doesn pain deserve die lie rape',
'sale NAME_1 good condition good condition player component speaker mount door car maintain clean good car solid body spot surface spot touch make car problem firm car average cost interested call email'

What are the topics about these documents? Wrap the entire output in JSON format.
user