4675
Maraging steels have high strength and good ductility , and therefore have been widely used in aerospace and tooling sectors for many years .
 material: Maraging steels; machanical property: strength; machanical property: ductility; application: aerospace; concept or principle: tooling
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: Maraging steels, strength, ductility, aerospace, tooling 
Answer:
 material: Maraging steels; machanical property: strength; machanical property: ductility; application: aerospace; concept or principle: tooling