657
Due to its unique characteristics , Mg alloys were used to manufacture cardiovascular stents and bone screws .
 material: Mg alloys; concept or principle: manufacture; machine or equipment: cardiovascular stents; machine or equipment: bone screws
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:
 material: Mg alloys; concept or principle: manufacture; machine or equipment: cardiovascular stents; machine or equipment: bone screws