8319
The rotational correlation time tau ( c ) for PF ( 6 ) ( - ) rotation follows the sequence gamma - phase < alpha - phase =~ liquid < beta - phase .
 Chemical: PF ( 6 ) ( - )
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: PF ( 6 ) ( - )