title: Campanian
context: The Campanian is, in the ICS' geologic timescale, the fifth of six ages of the Late Cretaceous epoch (or, in chronostratigraphy: the fifth of six stages in the Upper Cretaceous series). The Campanian spans the time from 83.6 ± 0.7Ma to 72.1 ± 0.6 Ma(million years ago). It is preceded by the Santonian and it is followed by the Maastrichtian.[2]
question: When was the Campanian age?
answers: 83.6 ± 0.7Ma to 72.1 ± 0.6 Ma