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in the development and application of the principle of least action by Pierre Louis Maupertuis and Leonhard Euler , and in the development of quantum mechanics by Max Planck , Werner Heisenberg and Louis de Broglie .
 person: Pierre Louis Maupertuis; person: Leonhard Euler; person: Max Planck; person: Werner Heisenberg; person: Louis de Broglie
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Pierre Louis Maupertuis; person: Leonhard Euler; person: Max Planck; person: Werner Heisenberg; person: Louis de Broglie