Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: Who does Sierra Rose think is her father? Passage:Stacy Morasco, younger sister to Gigi, is first seen on February 6, 2009 as a Las Vegas stripper named "Gigi." She begins spying on Gigi and Rex Balsom, later following them back to Llanview. Gigi is thrilled to see her, but devastated by the news that their parents had died in a car crash years before, and Stacy's own struggles since. Stacy makes fast friends with Gigi and Rex's son Shane, although Gigi is somewhat uncomfortable with Stacy's influence. Gigi also begins to suspect that her sister is trying to seduce Rex. After Shane is diagnosed with leukemia in March 2009, Stacy learns of a matching donor. Wanting Rex for herself, she pretends that she is the match and forces Gigi to break up with Rex in exchange for her blood. Shane receives the transplant and improves, but Gigi is afraid to reveal Stacy's blackmail in case Shane needs more of her stem cells. Eventually, Gigi tells the truth, but in the meantime Stacy and Rex have slept together. Rex and Gigi reunite as Stacy's blackmail is revealed. Rex spurns Stacy, but she discovers that she is pregnant. She miscarries but keeps the truth from Rex knowing that it is her only hold over him. Stacy calls her stripper best friend Kimberly Andrews to come to Llanview, who comes up with a plan to help get Stacy pregnant again to pass the baby off as Rex's. She drugs ex-boyfriend Schuyler Joplin but he refuses her. She becomes pregnant after seducing a drunken Oliver Fish. In November 2009 Schuyler finds out that Stacy lost her baby with Rex, and Kim tells Schuyler that he is the baby's father. Schuyler agrees to keep the truth from Rex so that he can have Gigi for himself. In January 2010 Rex's crazed biological father Mitch Laurence tries to kidnap Stacy to raise her baby as his heir. Kim and Stacy tells Schuyler to steal a drug called oxytocin so Stacy can give birth a month before her due date to pass the baby as Rex's. On February 2, 2010 Stacy is kidnapped by Mitch Laurence. When she reveals that the baby is not Rex's, Mitch abandons Stacy in a blizzard. Gigi finds her, takes her to a cabin, and on February 11, 2010 helps Stacy deliver a baby girl she names Sierra Rose. On February 16, 2010, Stacy falls through the ice of a frozen lake; despite Rex and Oliver's attempts to save her, she disappears beneath the ice and is presumed dead. Days later, Stacy's spirit appears to Kim several times to get Kim's assurance that she will do all she can to care for Sierra.


b