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These results show both a variety of thermite-based energetics with easily modifiable reaction rates and a technique to print said reactive materials to create composite structures .
 process parameter: reaction rates; manufacturing process: print; material: reactive materials; concept or principle: composite structures
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: reaction rates, print, reactive materials, composite structures 
Answer:
 process parameter: reaction rates; manufacturing process: print; material: reactive materials; concept or principle: composite structures