user: ### NOW ANSWER:
Question: Who sang the song composed by Mariah Carey and Walter Afanasieff?
Columns: ['Rank', 'Song title', 'Composer(s)', 'Performer(s)', 'Year']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, '" All I Want for Christmas Is You "', 'Mariah Carey and Walter Afanasieff', 'Mariah Carey', 1994.0]
SQL:

assistant: SELECT "Performer(s)" FROM "Table" WHERE "Composer(s)" = 'Mariah Carey and Walter Afanasieff';