4066
Oxygen increased in samples from 0.016 wt. % in Ar to 0.1 wt. % in CO2 .
 material: Oxygen; concept or principle: samples; enabling technology: Ar; material: CO2
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: Oxygen, samples, Ar, CO2 
Answer:
 material: Oxygen; concept or principle: samples; enabling technology: Ar; material: CO2