1087
Here , a multi-step transformation method from a greyscale SIMP-based solution into STL and IGES formats has been presented .
 concept or principle: solution; manufacturing standard: STL; manufacturing standard: IGES
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: solution; manufacturing standard: STL; manufacturing standard: IGES