23426
An array of 40 000 membranes maintained high impedance over 72 h , followed by rupture of most of the membranes by 82 h .
 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