72605
Shipwrecks by virtue of their preservation at a moment in time and because of the relative inaccessibility of underwater sites and the potential for preservation of organic remains provide a rich archaeological resource from the bronze age to the modern era .
 time: bronze age
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: bronze age 
Answer:
 time: bronze age