17116
The injectable but high - strength and externally triggerable nature of these materials , coupled with their biological degradability and inertness , suggest potential biological applications in tissue engineering and drug delivery .
 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