// Declare the function
function whoWroteWhat(string writer = "William Blake", string work = "Jerusalem")
{
  writeln($catalog.system.out, writer + " wrote " + work);
}

call whoWroteWhat(work = "On Another's Sorrow");
call whoWroteWhat(work = "Seven Deadly Sins", writer = "Carl Barāt and Peter Doherty");
call whoWroteWhat();