3584
Upon validation of the IR parameters for a melted area , experimentation was conducted to also determine powder emissivity ( found to be 0.50 ) .
 concept or principle: validation; process characterization: IR; concept or principle: melted; process parameter: area; material: powder; material: be
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: validation, IR, melted, area, powder, be 
Answer:
 concept or principle: validation; process characterization: IR; concept or principle: melted; process parameter: area; material: powder; material: be