7017
Two different grades of stainless steel were used : a martensitic 15-5 precipitation hardenable PH1 and an austenitic 316L .
 material: stainless steel; concept or principle: precipitation; material: austenitic
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: stainless steel, precipitation, austenitic 
Answer:
 material: stainless steel; concept or principle: precipitation; material: austenitic