Remote Explain The Following Text Primarily Based On The Surrounding Page Content: "which Of The Following Statements About The Pivot Recipe Is False? The Schema Of The Output Dataset Cannot Be Computed Until The First Time A Pivot Recipe Is Run. Multiple Columns Can Be Defined As Row Identifiers. If No Row Identifier Columns Are Selected, There Is A Single Row Of Output. Columns With Over 20 Categories Cannot Be Selected As Pivot Columns." Jobs