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Recent developments in 3D printing methods of fiber reinforced polymers , namely , fused deposition modeling , laminated object manufacturing , stereolithography , extrusion , and selective laser sintering are reviewed in this study to understand the trends and future directions in the respective areas .
 manufacturing process: 3D printing; material: fiber reinforced polymers; manufacturing process: fused deposition modeling; manufacturing process: laminated object manufacturing; manufacturing process: stereolithography; manufacturing process: extrusion; manufacturing process: selective laser sintering; concept or principle: trends; process parameter: areas
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:
 manufacturing process: 3D printing; material: fiber reinforced polymers; manufacturing process: fused deposition modeling; manufacturing process: laminated object manufacturing; manufacturing process: stereolithography; manufacturing process: extrusion; manufacturing process: selective laser sintering; concept or principle: trends; process parameter: areas