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Details of the simulation reveal that a recirculating vortex of melted polymer is formed at the fiber entrance to the hot end .
 enabling technology: simulation; concept or principle: melted; material: fiber; machine or equipment: hot end
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: simulation, melted, fiber, hot end 
Answer:
 enabling technology: simulation; concept or principle: melted; material: fiber; machine or equipment: hot end