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Polypropylene emerged as a promising 3-D printable material for semiconductor processing due to its tolerance of strongly oxidizing acids , such as nitric and sulfuric acids .
 material: Polypropylene; material: as; concept or principle: 3-D; material: material; material: semiconductor; process parameter: tolerance; material: as
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: Polypropylene, as, 3-D, material, semiconductor, tolerance, as 
Answer:
 material: Polypropylene; material: as; concept or principle: 3-D; material: material; material: semiconductor; process parameter: tolerance; material: as