1850
Computer analysis , simple correlation hypothesis , and distribution method with 1 degree of freedom revealed significant correlation between vertical root fracture and the technique of instrumentation and obturation of the canal ( p = 0 . 025 ) , the length of the post ( p = 0 . 05 ) , and the existence of the post ( p = 0 . 05 ) .
 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