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Part complexity allows designs to be optimized for specific applications such as light-weighting in aerospace parts or improving bone growth and implant success in bone implants .
 concept or principle: complexity; engineering feature: designs; material: be; material: as; application: aerospace; concept or principle: bone growth; application: implant; application: bone implants
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: complexity; engineering feature: designs; material: be; material: as; application: aerospace; concept or principle: bone growth; application: implant; application: bone implants