What is the difference in the industry bird size processed at Palestine, Texas compared to those at Bryan, Texas?
{"Laurel, Mississippi": {"Market": "Big Bird", "Capacity Per Week  ": 650000, "Industry Bird Size": 8.95}, "Hammond, Louisiana": {"Market": "Big Bird", "Capacity Per Week  ": 650000, "Industry Bird Size": 8.95}, "Hazlehurst, Mississippi": {"Market": "Big Bird", "Capacity Per Week  ": 650000, "Industry Bird Size": 8.95}, "Collins, Mississippi": {"Market": "Big Bird", "Capacity Per Week  ": 1300000, "Industry Bird Size": 8.95}, "Waco, Texas": {"Market": "Big Bird", "Capacity Per Week  ": 1300000, "Industry Bird Size": 8.95}, "Palestine, Texas": {"Market": "Big Bird", "Capacity Per Week  ": 1300000, "Industry Bird Size": 8.95}, "St. Pauls, North Carolina": {"Market": "Big Bird", "Capacity Per Week  ": 1300000, "Industry Bird Size": 8.95}, "McComb, Mississippi": {"Market": "Chill-Pack Retail", "Capacity Per Week  ": 1300000, "Industry Bird Size": 6.52}, "Bryan, Texas": {"Market": "Chill-Pack Retail", "Capacity Per Week  ": 1300000, "Industry Bird Size": 6.52}, "Moultrie, Georgia": {"Market": "Chill-Pack Retail", "Capacity Per Week  ": 1300000, "Industry Bird Size": 6.52}, "Kinston, North Carolina": {"Market": "Chill-Pack Retail", "Capacity Per Week  ": 1300000, "Industry Bird Size": 6.52}, "Tyler, Texas": {"Market": "Chill-Pack Retail", "Capacity Per Week  ": 1300000, "Industry Bird Size": 6.52}}
bird_size_palestine = df["Laurel, Mississippi"]["Industry Bird Size"]
bird_size_bryan = df["McComb, Mississippi"]["Industry Bird Size"]
answer = bird_size_palestine - bird_size_bryan