6327
Subsequent heat treatment led to an increase in strength and a corresponding reduction in plasticity owing to the formation of reinforcing particles of molybdenum silicides and an incomplete relaxation , with low grain growth .
 manufacturing process: heat treatment; machanical property: strength; concept or principle: reduction; machanical property: plasticity; concept or principle: particles; material: molybdenum; concept or principle: grain growth
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: heat treatment, strength, reduction, plasticity, particles, molybdenum, grain growth 
Answer:
 manufacturing process: heat treatment; machanical property: strength; concept or principle: reduction; machanical property: plasticity; concept or principle: particles; material: molybdenum; concept or principle: grain growth