1721
We report on the methodology and the operational parameters used , as well as presenting an analysis of the samples via optical microscopy and tomography .
 concept or principle: methodology; concept or principle: parameters; material: as; material: as; concept or principle: samples; process characterization: optical microscopy
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: methodology, parameters, as, as, samples, optical microscopy 
Answer:
 concept or principle: methodology; concept or principle: parameters; material: as; material: as; concept or principle: samples; process characterization: optical microscopy