Task: Pos Tagging
Input (English): What is the build year of the Model designation that involved the rebuilding of their aging fleet , many of which were over twenty years old ?
Output (English): WP VBZ DT JJ NN IN DT NNP NN WDT VBD DT NN IN PRP$ VBG NN , JJ IN WDT VBD IN JJ NNS JJ .