1649
It was discovered that spatter is caused as a result of negative impact of laser on the building of parts in successive layers during selective laser melting process .
 process characterization: spatter; material: as; concept or principle: impact; enabling technology: laser; process characterization: building of parts; manufacturing process: selective laser melting process
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:
 process characterization: spatter; material: as; concept or principle: impact; enabling technology: laser; process characterization: building of parts; manufacturing process: selective laser melting process