581
They also found that the quality of AM parts was highly dependent on the materials , machines and process parameters .
 concept or principle: quality; machine or equipment: AM parts; concept or principle: materials; machine or equipment: machines; concept or principle: process parameters
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:
 concept or principle: quality; machine or equipment: AM parts; concept or principle: materials; machine or equipment: machines; concept or principle: process parameters