469
Modern studies , conducted with Delta - 9 - THC , in healthy voluntaries , again suggest the comparison or even the identity of the modifications caused by cannabis with sleep and dream .
 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