4835
First , a closed form solution of a line heat source is calculated to represent the laser scanning vectors in a semi-infinite space .
 concept or principle: solution; concept or principle: heat source; enabling technology: laser
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: solution, heat source, laser 
Answer:
 concept or principle: solution; concept or principle: heat source; enabling technology: laser