( ( ( ( ( ( ( Ice masses ) , ) aquifers ) , ) and ) ( the ( deep ocean ) ) ) ( ( are ( water reservoirs ) ) . ) )
(ROOT (S (NP (NP (NN Ice) (NNS masses)) (, ,) (NP (NNS aquifers)) (, ,) (CC and) (NP (DT the) (JJ deep) (NN ocean))) (VP (VBP are) (NP (NN water) (NNS reservoirs))) (. .)))
Ice masses, aquifers, and the deep ocean are water  reservoirs.
(ROOT (S (NP (NP (NN Ice) (NNS masses)) (, ,) (NP (NNS acquifers)) (, ,) (CC and) (NP (DT the) (JJ deep) (NN ocean))) (VP (VBP are) (NP (NP (NNS examples)) (PP (IN of) (NP (NN water) (NNS reservoirs))))) (. .)))