West's third studio album, Graduation, garnered major publicity when its release date pitted West in a sales competition against rapper 50 Cent's Curtis. Upon their September 2007 releases, Graduation outsold Curtis by a large margin, debuting at number one on the U.S. Billboard 200 chart and selling 957,000 copies in its first week. Graduation once again continued the string of critical and commercial successes by West, and the album's lead single, "Stronger", garnered the rapper his third number-one hit. "Stronger", which samples French house duo Daft Punk, has been accredited to not only encouraging other hip-hop artists to incorporate house and electronica elements into their music, but also for playing a part in the revival of disco and electro-infused music in the late 2000s. Ben Detrick of XXL cited the outcome of the sales competition between 50 Cent's Curtis and West's Graduation as being responsible for altering the direction of hip-hop and paving the way for new rappers who didn't follow the hardcore-gangster mold, writing, "If there was ever a watershed moment to indicate hip-hop's changing direction, it may have come when 50 Cent competed with Kanye in 2007 to see whose album would claim superior sales."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Kanye released Graduation at the same time of what other famous rapper, thus drawing media comparison?
50 Cent