1165
On this account , considering that lattices are not stiffnesB-optimal and given the choice , surface-based unit cells should be favoured for lightweight designs .
 concept or principle: lattices; concept or principle: unit cells; material: be; concept or principle: lightweight; engineering feature: designs
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: lattices; concept or principle: unit cells; material: be; concept or principle: lightweight; engineering feature: designs