1972
In structure design , we usually use the second method , applying evolutionary algorithms to sample and generate design solutions that are close to predefined objectives and criteria .
 engineering feature: structure design; concept or principle: algorithms; concept or principle: sample; engineering feature: design
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: structure design, algorithms, sample, design 
Answer:
 engineering feature: structure design; concept or principle: algorithms; concept or principle: sample; engineering feature: design