1203
Additive manufacturing ( AM ) has been considered as a promising technology with higher resource efficiency and better ecological benefits in production systems .
 manufacturing process: Additive manufacturing; manufacturing process: AM; material: as; concept or principle: technology; enabling technology: production systems
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: Additive manufacturing, AM, as, technology, production systems 
Answer:
 manufacturing process: Additive manufacturing; manufacturing process: AM; material: as; concept or principle: technology; enabling technology: production systems