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It was found that the pillar octahedral shape has not only greater stiffness and strength under compression , shear and torsion but increased rate of pre-osteoblastic cell proliferation .
 machanical property: stiffness; machanical property: strength; machanical property: compression; application: cell
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: stiffness, strength, compression, cell 
Answer:
 machanical property: stiffness; machanical property: strength; machanical property: compression; application: cell