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Dissolved oxygen in weld zone leads to distinct microstructures from base metal after annealing .
 material: oxygen; concept or principle: weld zone; material: microstructures; material: base metal; manufacturing process: annealing
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:
 material: oxygen; concept or principle: weld zone; material: microstructures; material: base metal; manufacturing process: annealing