1994
The lattice structures are similar to the micro porous for the traditional solid structure in homogenized volumes .
 engineering feature: lattice structures; machanical property: porous; concept or principle: structure; machanical property: homogenized volumes
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: lattice structures, porous, structure, homogenized volumes 
Answer:
 engineering feature: lattice structures; machanical property: porous; concept or principle: structure; machanical property: homogenized volumes