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The measurement of the laser absorption is very sensitive to variations of the powder and reveals a clear correlation to the final part densities .
 process characterization: measurement; enabling technology: laser; concept or principle: absorption; concept or principle: variations; material: powder
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: measurement, laser, absorption, variations, powder 
Answer:
 process characterization: measurement; enabling technology: laser; concept or principle: absorption; concept or principle: variations; material: powder