Show company name and main industry without a gas station.
SELECT company ,  main_industry FROM company WHERE company_id NOT IN (SELECT company_id FROM station_company)
SELECT company ,  main_industry FROM company WHERE company_id NOT IN (SELECT company_id FROM station_company)
[{'Company': 'General Electric', 'Main_Industry': 'Conglomerate'}, {'Company': 'Industrial and Commercial Bank of China', 'Main_Industry': 'Banking'}, {'Company': 'HSBC', 'Main_Industry': 'Banking'}, {'Company': 'Berkshire Hathaway', 'Main_Industry': 'Conglomerate'}, {'Company': 'Wells Fargo', 'Main_Industry': 'Banking'}]