5499
The relatively simple graded cellular designs are beneficial in applications where high bending stiffness and low density are essential .
 manufacturing process: simple; engineering feature: cellular designs; manufacturing process: bending; machanical property: density
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: simple, cellular designs, bending, density 
Answer:
 manufacturing process: simple; engineering feature: cellular designs; manufacturing process: bending; machanical property: density