1959
It was found that the cyclic response of lattices depend not only on the type of bulk material , but also on the roughness of the outer surface of the struts and the distribution of the micro-pores inside the struts which can both affect the crack initiation and crack propagation .
 concept or principle: lattices; material: material; machanical property: roughness; concept or principle: surface; machine or equipment: struts; concept or principle: distribution; machine or equipment: struts; concept or principle: crack propagation
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; material: material; machanical property: roughness; concept or principle: surface; machine or equipment: struts; concept or principle: distribution; machine or equipment: struts; concept or principle: crack propagation