What is most frustrating to people like Mr. Guo , whose wife has the disease , is that snail fever was largely eradicated in China during the 1950 's as part of a national campaign ordered by Mao Zedong .
Mao Zedong /people/person/nationality China
WP VBZ RBS JJ TO NNS IN NNP NNP , WP$ NN VBZ DT NN , VBZ IN NN NN VBD RB VBN IN NNP IN DT CD POS IN NN IN DT JJ NN VBN IN NNP NNP .