if is (value at j in map (the element at index i of stack stmts)) a while statement = True, then result of executing a Python program where statements is stmts, line is i, tab isj, expression stack is[ ], values stack isvals, variables isvars, and control map iscontrol = result of executing a Python program where statements is stmts, line is i, tab isj, expression stack is[ [ get expression from (value at j in map (the element at index i of stack stmts)), [ ] ], [ ] ], values stack is[ [ ], [ ] ], variables isvars, and control map iscontrol