5135
In addition , the use of waste materials in additive manufacturing in the private sector would reduce cost and increase sustainability , providing a high-value output for used plastics .
 concept or principle: materials; manufacturing process: additive manufacturing; concept or principle: sustainability; material: plastics
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, additive manufacturing, sustainability, plastics 
Answer:
 concept or principle: materials; manufacturing process: additive manufacturing; concept or principle: sustainability; material: plastics