84959
Through his career , aviation pioneer Alberto Santos-Dumont designed , built , and demonstrated a variety of types of aircraft - balloons , airships ( dirigibles ) , monoplanes , biplanes , and a helicopter .
 Alberto Santos-Dumont
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Alberto Santos-Dumont