InQueryCall = (C,A,L,L), SP, ExplicitProcedureInvocation, [[SP], (Y,I,E,L,D), SP, YieldItems] ;
YieldItems = ('*' | (YieldItem, { [SP], ',', [SP], YieldItem })), [[SP], Where] ;
YieldItem = [ProcedureResultField, SP, (A,S), SP], Variable ;
ProcedureResultField = SymbolicName ;
Variable = SymbolicName ;
Where = (W,H,E,R,E), SP, Expression ;