1540
The organ transplantation sector has difficulties and the organ printing by jet based on 3d tissue engineering offers a possible solution .
 concept or principle: organ transplantation; manufacturing process: organ printing; application: 3d tissue engineering; concept or principle: solution
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:
 concept or principle: organ transplantation; manufacturing process: organ printing; application: 3d tissue engineering; concept or principle: solution