8956
These include airway bypass by creation of airway / parenchyma communications , one - way endobronchial valves occluding the airways of the targeted lobes , endobronchial coils which mechanically contract the parenchyma , hot vapour ablation thermally destroying the targeted sites and sealant which fill the alveoli with polymer material .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None