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The adhesion and merging of adjacent filaments in polymer extrusion based additive manufacturing ( AM ) plays a key role in determining the thermal and mechanical properties of the built part .
 machanical property: adhesion; material: filaments; manufacturing process: polymer extrusion; manufacturing process: additive manufacturing; manufacturing process: AM; concept or principle: mechanical properties
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: adhesion, filaments, polymer extrusion, additive manufacturing, AM, mechanical properties 
Answer:
 machanical property: adhesion; material: filaments; manufacturing process: polymer extrusion; manufacturing process: additive manufacturing; manufacturing process: AM; concept or principle: mechanical properties