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3.4 Lithium dissilicate Lithium silicate-based glasB-ceramics were recently introduced as machinable materials to respond to the demanded increased strength , toughness and wear resistance , required for the fabrication of dental pieces .
 material: Lithium; material: Lithium; material: as; concept or principle: materials; machanical property: demanded increased strength; machanical property: toughness; machanical property: wear resistance; manufacturing process: fabrication; machine or equipment: dental pieces
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: Lithium; material: Lithium; material: as; concept or principle: materials; machanical property: demanded increased strength; machanical property: toughness; machanical property: wear resistance; manufacturing process: fabrication; machine or equipment: dental pieces