40696
British warships , constructed using such innovations as steam power combined with sail and the use of iron in shipbuilding , wreaked havoc on coastal towns ; such ships ( like the " Nemesis " ) were not only virtually indestructible using contemporary available weapons , but also highly mobile and able to support a gun platform with very heavy guns .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None