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Based on this method , the bioprinted cell-laden gelatin-alginate hydrogel filaments are precisely arranged in a meshed pattern that is bound by the burn phantom contour .
 material: hydrogel filaments; concept or principle: pattern; engineering feature: contour
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: hydrogel filaments, pattern, contour 
Answer:
 material: hydrogel filaments; concept or principle: pattern; engineering feature: contour