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Biocompatible and biodegradable poly ( lactic acid ) ( PLA ) and hydroxyapatite ( HAP ) are widely used for bone repair .
 machanical property: Biocompatible; material: PLA; material: hydroxyapatite; biomedical: bone
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: Biocompatible, PLA, hydroxyapatite, bone 
Answer:
 machanical property: Biocompatible; material: PLA; material: hydroxyapatite; biomedical: bone