52922
Safe houses tend to be located in or near buildings where useful items can be found , such as shopping malls , police stations , hospitals , and the laboratories of the zombie-related NecroTech corporation .
 NecroTech
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 NecroTech