Assertion: wave | /r/HasProperty | mechanical cotton picker
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Source sentences:
text: If the speedy development of technologies at the crest of the second wave caused the mass displacement from the first wave (e.g. the mechanical cotton picker, the grain thresher etc.), then the same thing is happening at the crest of the third wave (The End of Work, J. Rifkin) and will drive society more quickly into being pulled or driven ahead by the fourth wave.