Question: Angel is a fictional character created by who, and David Greenwalt for the American television programs "Buffy the Vampire Slayer" and its spin-off series "Angel", the character is portrayed by actor David Boreanaz, an American actor, television producer, and director, known for playing vampire-turned-private investigator Angel on "Buffy the Vampire Slayer" (1997–2003) and its spinoff "Angel" (1999–2004)?
{'answer': 'Joss Whedon', 'supporting_facts': [['Angel (Buffy the Vampire Slayer)', 0], ['David Boreanaz', 0]]}