5701
Density grading of bending-dominated unit cell lattices showcased better energy absorption capability for small displacements , whereas grading of the stretching-dominated counterparts is advantageous for large displacements when compared to the ungraded lattice .
 Density, unit cell, lattices, energy absorption, ungraded lattice
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 Density, unit cell, lattices, energy absorption, ungraded lattice