Task: Question Answering
Input (English): Passage: David Huxley is a mild-mannered paleontologist. For the past four years, he has been trying to assemble the skeleton of a Brontosaurus but is missing one bone: the "intercostal clavicle". Adding to his stress is his impending marriage to the dour Alice Swallow and the need to impress Elizabeth Random, who is considering a million-dollar donation to his museum.
The day before his wedding, David meets Susan Vance by chance on a golf course when she plays his ball. She is a free-spirited, somewhat scatterbrained young lady unfettered by logic. These qualities soon embroil David in several frustrating incidents.
Susan's brother Mark has sent her a tame leopard named Baby from Brazil. Its tameness is helped by hearing "I Can't Give You Anything But Love". Susan thinks David is a zoologist, and manipulates him into accompanying her in taking Baby to her farm in Connecticut. Complications arise when Susan falls in love with him and tries to keep him at her house as long as possible, even hiding his clothes, to prevent his imminent marriage.
David's prized intercostal clavicle is delivered, but Susan's aunt's dog George takes it and buries it somewhere. When Susan's aunt arrives, she discovers David in a negligee. To David's dismay, she turns out to be potential donor Elizabeth Random. A second message from Mark makes clear the leopard is for Elizabeth, as she always wanted one. Baby and George run off. The zoo is called to help capture Baby. Susan and David race to find Baby before the zoo and, mistaking a dangerous leopard (also portrayed by Nissa) from a nearby circus for Baby, let it out of its cage. 
Question: Whose tameness is helped by hearing "I Can't Give You Anything But Love"?
Output (English): Baby.