7199
However , since porosity is inversely related to strength , the microstructure must be optimized to achieve bone scaffolds suitable for load-bearing applications .
 machanical property: porosity; machanical property: strength; concept or principle: microstructure; material: be; biomedical: bone scaffolds; engineering feature: load-bearing
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: porosity, strength, microstructure, be, bone scaffolds, load-bearing 
Answer:
 machanical property: porosity; machanical property: strength; concept or principle: microstructure; material: be; biomedical: bone scaffolds; engineering feature: load-bearing