6494
The results show the significance of evaporation and its related recoil pressure for a feasible prediction of the melt pool dynamics .
 concept or principle: evaporation; concept or principle: pressure; concept or principle: prediction; material: melt pool
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: evaporation, pressure, prediction, melt pool 
Answer:
 concept or principle: evaporation; concept or principle: pressure; concept or principle: prediction; material: melt pool