2053
Frequently cited is Leonardo da Vinci 's 15th - century sketch of a mobile , protected gun-platform ; the drawings show a conical , wooden shelter with apertures for cannons around the circumference .
 person: Leonardo da Vinci
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Leonardo da Vinci