16606
They were also mesoporous ( pore size = 3 . 5 A ) , having a rather high BET surface area ( 75 m ( 2 ) g ( - 1 ) ) .
 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