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There is a high level of interest in these structures recently , particularly due to their high strength to weight ratios and osteoconductive properties .
 machanical property: strength to weight ratios; machanical property: osteoconductive
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: strength to weight ratios, osteoconductive 
Answer:
 machanical property: strength to weight ratios; machanical property: osteoconductive