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The insufficiencies of application of autograft and allograft tissue have led to greater research efforts to identify biomimetic materials and structures that are suitable for skeletal repair without the inherent problems .
 biomedical: autograft; material: allograft tissue; application: led; concept or principle: research; material: biomimetic materials
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:
 biomedical: autograft; material: allograft tissue; application: led; concept or principle: research; material: biomimetic materials