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An increase in stiffness by more than a third over the uniform lattice was revealed in the experiment , highlighting a viable design approach for structurally enhanced AM-parts .
 machanical property: stiffness; concept or principle: lattice; concept or principle: experiment; engineering feature: design
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:
 machanical property: stiffness; concept or principle: lattice; concept or principle: experiment; engineering feature: design