Complete the following sentence: In 2003, his work "Requiem Aeternam 1953", a composition for choir and orchestra, was premiered on the occasion of the 50th anniversary of the
1953 North Sea flood<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️