26071
Dependent on their signal strength , open chromatin regions showed correlation with promoter and enhancer histone marks , distance to the transcription start site and ontology classes of nearby genes .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None