Based on the clue '8 years after their farewell concert this duo reun...', what is the answer?

Based on the clue '8 states begin with m another 8 with this letter', what is the answer? What is associated with: 8 year old maria de sautuola discovered 15000 year old paintings on the ceiling of one of thes… What is associated with: 8 years after his circumnavigation of the globe 1577 to 1580 he helped england defeat the span… Based on the clue '8 years after jackie robinson broke in with the do...', what is the answer? Based on the clue '8 years after this duo was stripped of its grammy ...', what is the answer? Based on the clue '8 years before speed he co starred with drew barry...', what is the answer? Based on the clue '8 years before the origin of species was published...', what is the answer? Based on the clue '80 of americas trash ends up in these within 5 ye...', what is the answer?