Question: California Gurls was produced in part by a Swedish record producer rose to prominence in the second half of the 1990, after making hits for the Backstreet Boys, Britney Spears, and who?
Sentence (from "Simon Ellis (record producer)"): Simon Ellis is a producer and musical director who has worked with Britney Spears, the Spice Girls, Westlife, S Club 7 and East 17.
Relevant evidence: No