787
In silicosis , significant relationships between patients and sons were not seen with respect to arterial blood gas determinations and ventilatory responses except for Paco2 of patients and hypercapnic ventilatory responses of sons .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None