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The addition of carbon fiber was shown to decrease tensile strength for some materials when printed with beads not aligned with the loading direction .
 material: carbon fiber; machanical property: tensile strength; concept or principle: materials; process characterization: beads
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: carbon fiber, tensile strength, materials, beads 
Answer:
 material: carbon fiber; machanical property: tensile strength; concept or principle: materials; process characterization: beads