Scientists test ice cores in the frozen parts of the world to see how much air will pass between the firn.
(Scientists; test; ice cores; to see how much air will pass between the firn) Context(Scientists test,List([0, 15))):(Scientists; test ice cores to see; how much air will pass between the firn)
Scientists test,List([0, 15))
Scientists Scientists
test test ice cores to see
ice cores to see how much air will pass between the firn
how much air will pass between the firn