4531
It was reported that he completed the London Marathon at the age of 79 ; rumours that he was driven round in a lead vehicle as an " observer " , were denied by marathon officials .
 event: London Marathon
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:
 event: London Marathon