Please answer the following question: Generate a question that has the following answer: Bob Dylan for the following movie plot: This is a bio pic about Edie Sedgwick, (played magnificently by Sienna Miller) a waif-like rich girl who found favor with the celebrity media (hmmm, who does that sound like in todays culture?) in the 1960s through her association with pop artist, Andy Warhol (another great performance, this time by Guy Pearce). The pair of them form the core of a bunch of self-indulgent, unfettered sixties socialites that cling to Warhol, as he holds court at his studio (known as the factory, hence the title) as they live lives of excess and denial. Sedgwicks family is shown in a horrible light and Warhol is portrayed as an immature, narcissistic leech, constantly looking for rich people to exploit. Christensen plays folk singer, Billy Quinn, a fictional character rumored to be taking the place of Bob Dylan, who apparently had a relationship with Sedgwick. (this first appeared on realmoviereview.com)
A:
Billy Quinn is a fictional character, rumored to be taking the place of who?