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2 Structure and properties of bone 2.1 Structure of bone Bone is a natural composite containing both organic components and inorganic crystalline mineral , as illustrated in 2 .
 concept or principle: Structure; concept or principle: properties; biomedical: bone; concept or principle: Structure; biomedical: bone; material: composite; machine or equipment: organic components; material: as
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: Structure; concept or principle: properties; biomedical: bone; concept or principle: Structure; biomedical: bone; material: composite; machine or equipment: organic components; material: as