1016
An intrinsic aspect is , therefore , representing the primary drivers when designing for AM , whereas the extrinsic factors can be regarded as current research topics in design and structural optimization for AM .
 manufacturing process: AM; concept or principle: extrinsic factors; material: be; material: as; concept or principle: research; concept or principle: design and structural optimization; manufacturing process: AM
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:
 manufacturing process: AM; concept or principle: extrinsic factors; material: be; material: as; concept or principle: research; concept or principle: design and structural optimization; manufacturing process: AM