17985
The resulting graphene aerogels with density as low as 3 mg cm ( - 3 ) show excellent resilience and can completely recover after more than 90 % compression .
 Chemical: graphene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: graphene