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Material based actuation with metallic fibers , for example shape memory alloys ( SMA ) is gaining popularity to replace the conventional bulky actuators used for shape morphing in aerospace sectors .
 material: Material; material: metallic fibers; material: shape memory alloys; machine or equipment: actuators; application: aerospace
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: Material, metallic fibers, shape memory alloys, actuators, aerospace 
Answer:
 material: Material; material: metallic fibers; material: shape memory alloys; machine or equipment: actuators; application: aerospace