<Dd> Where on the deck my Captain lies, <Dl> <Dd> Fallen cold and dead . </Dd> </Dl> </Dd> <Dl> <Dd> Fallen cold and dead . </Dd> </Dl> <Dd> Fallen cold and dead . </Dd> <P> O Captain! My Captain! rise up and hear the bells; Rise up--for you the flag is flung--for you the bugle trills; For you bouquets and ribbon'd wreaths--for you the shores a-crowding; For you they call, the swaying mass, their eager faces turning; </P>

What does the phrase oh captain my captain mean