914
Such variations in the microstructure significantly change the mechanical properties of the FW material .
 concept or principle: variations; concept or principle: microstructure; concept or principle: mechanical properties; material: material
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: variations; concept or principle: microstructure; concept or principle: mechanical properties; material: material