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Mechanical testing of samples shows excellent ductility and high mechanical strength .
 process characterization: Mechanical testing; concept or principle: samples; machanical property: ductility; machanical property: mechanical strength
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: Mechanical testing, samples, ductility, mechanical strength 
Answer:
 process characterization: Mechanical testing; concept or principle: samples; machanical property: ductility; machanical property: mechanical strength