Question: Where did the second single from the September 15, 2017 Foo Fighters album peak on the Billboard" Mainstream Rock Songs chart?
{'answer': 'number 7', 'supporting_facts': [['Concrete and Gold', 0], ['Concrete and Gold', 2], ['Concrete and Gold', 3], ['The Sky Is a Neighborhood', 1], ['The Sky Is a Neighborhood', 2]]}