98
The glass composition is almost the same as the pure glass category , being that the difference resides in the amount of different types of crystals that can either be added or grown in the glassy matrix .
 material: glass; concept or principle: composition; material: as; material: glass; material: be
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: glass; concept or principle: composition; material: as; material: glass; material: be