2846
Relevant negative effects of the crosB-contamination of the raw material are originally identified in this paper , which emphasizes the inadequacy of current acceptability protocols for PBF powders .
 concept or principle: crosB-contamination; material: raw material; concept or principle: protocols; manufacturing process: PBF
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: crosB-contamination, raw material, protocols, PBF 
Answer:
 concept or principle: crosB-contamination; material: raw material; concept or principle: protocols; manufacturing process: PBF