8286
Nevertheless , there were significant differences in porosity , which probably depended on the properties of the materials used , both with and without carbon fibres , thus causing significant differences in light absorption and heat conductivity .
 machanical property: porosity; concept or principle: properties; concept or principle: materials; material: carbon fibres; concept or principle: absorption; machanical property: heat conductivity
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: porosity, properties, materials, carbon fibres, absorption, heat conductivity 
Answer:
 machanical property: porosity; concept or principle: properties; concept or principle: materials; material: carbon fibres; concept or principle: absorption; machanical property: heat conductivity