Please answer the following question: Extract the answer to the question from the following context. Question: What are two examples of female soft rock/pop singers? Context: Artists contributing to this format include mainly soft rock/pop singers such as, Andy Williams, Johnny Mathis, Nana Mouskouri, Celine Dion, Julio Iglesias, Frank Sinatra, Barry Manilow, Engelbert Humperdinck, and Marc Anthony.
A:
Nana Mouskouri, Celine Dion