11688
We use molecular dynamics ( MD ) simulations to show that a DNA - like double helix of two poly ( acetylene ) ( PA ) chains can form inside single - walled carbon nanotubes ( SWNTs ) .
 Chemical: poly ( acetylene ); Chemical: carbon
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: poly ( acetylene ); Chemical: carbon