51554
It was built by Sonat , Inc. , based in Birmingham , Alabama , for its Southern Natural Gas division .
 Sonat , Inc., Birmingham, Alabama, Southern Natural Gas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sonat , Inc., Birmingham, Alabama, Southern Natural Gas