1440
Other comparatively softer materials , such as aluminum alloys , easily respond to deformation defects due to their high thermal expansion coefficients .
 concept or principle: materials; material: as; material: aluminum alloys; machanical property: deformation defects; machanical property: thermal expansion coefficients
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: materials; material: as; material: aluminum alloys; machanical property: deformation defects; machanical property: thermal expansion coefficients