Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_20 (performer_s_ VARCHAR, composer_s_ VARCHAR)
### Question:
Who sang the song composed by Mariah Carey and Walter Afanasieff?
### Answer:
SELECT performer_s_ FROM table_name_20 WHERE composer_s_ = "mariah carey and walter afanasieff"