1960
Bimetallic structures belong to a class of multi-material structures , and they potentially offer unique solutions to many engineering problems .
 engineering feature: multi-material structures; application: engineering
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: multi-material structures, engineering 
Answer:
 engineering feature: multi-material structures; application: engineering