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For both materials , z-pinning increased the tensile strength and toughness in the z-direction by more than a factor of 3.5 .
 concept or principle: materials; enabling technology: z-pinning; machanical property: tensile strength; machanical property: toughness; engineering feature: z-direction
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: materials, z-pinning, tensile strength, toughness, z-direction 
Answer:
 concept or principle: materials; enabling technology: z-pinning; machanical property: tensile strength; machanical property: toughness; engineering feature: z-direction