6912
Our findings indicate that interparticle aggregation , SWNT penetration , and membrane curvature can be modulated by the SWNT - lipid structure and the PEG length .
 Chemical: PEG
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: PEG