17833
Gold - plated DNA origami structures made under optimal conditions had an average resistivity of 7 . 0 x 10 ( - 5 ) Omega . m , whereas copper - metallized structures had a resistivity as low as 3 . 6 x 10 ( - 4 ) Omega . m .
 Chemical: copper
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: copper 
Answer:
 Chemical: copper