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The WAAM-NAB sample exhibited considerably higher yield strength ( ˜88 MPa ) and elongation ( ˜10 % ) than the cast-NAB , but the gain in the ultimate tensile strength was marginal .
 concept or principle: sample; machanical property: yield strength; concept or principle: MPa; machanical property: elongation; process parameter: gain; machanical property: ultimate tensile 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: sample, yield strength, MPa, elongation, gain, ultimate tensile strength 
Answer:
 concept or principle: sample; machanical property: yield strength; concept or principle: MPa; machanical property: elongation; process parameter: gain; machanical property: ultimate tensile strength