4457
It was argued that this arose from the possibility that the nature of blue collar jobs was physical , and that loss of myocardial tissue might be expected to more markedly interfere with their work efficiency ( on returning to work ) than it would the efficiency of the more sedentary jobs of white collar workers .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None