6783
Differences in the magnitude of tolerance among CB ( 1 ) agonists during chronic treatment may be indicative of differences in their pharmacological efficacy , whereas the enhanced sensitivity to behaviorally disruptive effects of CB ( 1 ) antagonists may provide evidence for CB ( 1 ) - related behavioral and / or physical dependence .
 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