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Fiber additives play an important role in 4D printing ; controlling the fiber alignment allows programmable transformation , right out of the printing bed .
 material: Fiber additives; manufacturing process: 4D printing; engineering feature: fiber alignment; machine or equipment: bed
Please list all entity words in the text that fit the category.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} 
Answer:
 material: Fiber additives; manufacturing process: 4D printing; engineering feature: fiber alignment; machine or equipment: bed