6790
Ironically , the dinosaurs themselves had been beneficiaries of a previous mass extinction , the end-Triassic , which eliminated most of their chief rivals , the crurotarsans .
 location: end-Triassic
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: end-Triassic 
Answer:
 location: end-Triassic