Question: What was the name of the older brother who became the first African-American announcer to call play-by-play of a major sports championship in the United States, of currently a play-by-play broadcaster for the "NFL on CBS" alongside a former American football quarterback who earned a Super Bowl ring with the Rams and was selected to two Pro Bowls with the Chiefs?
{'answer': 'Bryant Gumbel', 'supporting_facts': [['Greg Gumbel', 2], ['Greg Gumbel', 4], ['Trent Green', 3]]}