77585
It was long considered that an effect preceding its cause is an inherent self-contradiction because , as 18th century philosopher David Hume discussed , when examining two related events , the cause , by definition , is the one that precedes the effect .
 person: David Hume
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: David Hume 
Answer:
 person: David Hume