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Substantial progress in acoustics , resting on firmer mathematical and physical concepts , was made during the eighteenth century by Euler ( 1707 – 1783 ) , Lagrange ( 1736 – 1813 ) , and d'Alembert ( 1717 – 1783 ) .
 person: Euler; person: Lagrange; person: d'Alembert
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Euler, Lagrange, d'Alembert 
Answer:
 person: Euler; person: Lagrange; person: d'Alembert