2673
The alloy is produced in situ through controlled addition of the elemental iron and aluminum components into the welding process .
 material: alloy; concept or principle: in situ; material: iron; material: aluminum; manufacturing process: welding; concept or principle: process
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: alloy, in situ, iron, aluminum, welding, process 
Answer:
 material: alloy; concept or principle: in situ; material: iron; material: aluminum; manufacturing process: welding; concept or principle: process