259589
This group can be viewed as a molecule of ethene ( ethylene , H2C = CH2 ) with an hydrogen removed from each carbon ; or a vinyl group − CH = CH2 with one hydrogen removed from the terminal carbon .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None