To the Editor : Re '' As China Ages , a Shortage of Cheap Labor Looms '' -LRB- front page , June 30 -RRB- : Our research examines the impact of population aging and longevity on New York , Tokyo , Paris and London and may provide lessons for the exploding megacities of the developing world , including Shanghai .
China /location/country/administrative_divisions Shanghai
China /location/location/contains Shanghai
Shanghai /location/administrative_division/country China
TO DT NNP : NNP '' IN NNP NNPS , DT NN IN JJ NN VBZ '' -LRB- JJ NN , NNP CD -RRB- : PRP$ NN VBZ DT NN IN NN NN CC NN IN NNP NNP , NNP , NNP CC NNP CC MD VB NNS IN DT VBG NNS IN DT VBG NN , VBG NNP .