2027
These structures/functionalities have been known for some time , but due to the ability of AM to produce these complex structures , they now become part of the solution principles that can be applied by the product designer .
 manufacturing process: AM; concept or principle: complex structures; concept or principle: solution; material: be
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: complex structures; concept or principle: solution; material: be