Conversation so far:
What is SAW?
CANNOTANSWER.
What music did he work on during this time period?
In 1994 Stock produced several artists for Simon Cowell.
What is the name of one of Simon Cowell's artists?
Kym Mazelle.
Did Mike make any notable music with them?
Their cover of Unchained Melody produced by Stock and Aitken became the highest selling non-charity single of the decade.

Question: How well did the song do on the charts?
Self-contained rewrite: How well did Kym Mazelle's cover of the song Unchained Melody do on the charts?