2681
The effective structural strength was 14–32 % of the strength of fully dense Ti-6Al-4V made by PBF and the ligament structural strength was 34–49 % of the strength of fully dense material .
 machanical property: strength; machanical property: strength; process parameter: fully dense; manufacturing process: PBF; machanical property: strength; machanical property: strength; process parameter: fully dense
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: strength, strength, fully dense, PBF, strength, strength, fully dense 
Answer:
 machanical property: strength; machanical property: strength; process parameter: fully dense; manufacturing process: PBF; machanical property: strength; machanical property: strength; process parameter: fully dense