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Our framework enables design of soft lattices with curved members conforming to freeform geometries , and with variable , gradually changing member thickness and material , allowing the local control of stiffness .
 concept or principle: framework; engineering feature: design; concept or principle: lattices; concept or principle: freeform geometries; material: material; machanical property: stiffness
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: framework, design, lattices, freeform geometries, material, stiffness 
Answer:
 concept or principle: framework; engineering feature: design; concept or principle: lattices; concept or principle: freeform geometries; material: material; machanical property: stiffness