7298
Cr enriched fine carbides ( Cr7C3 and Cr23C6 ) were embedded within the matrix .
 material: Cr; material: carbides
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: Cr, carbides 
Answer:
 material: Cr; material: carbides