Williamsville, NY-Based Natural Gas Distributor National Fuel Gas Co Generated Dec 2017 Quarter Net Income of $199 Mil, With $111 Mil or 56% of This $199 Mil of Total Dec 2017 Quarter Net Income Being the Income Tax Benefit Resulting From the US Federal Income Tax Debt Forgiveness Feature Included in the US Trump Tax Cuts Act That the Non-Regulated Activities of National Fuel Gas Co Gets