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Here we examine how changes in bulk solvent ( water , methanol , or DMF ) or applied pressure ( up to 150 MPa ) affect the rotational dynamics of encapsulated benzyl phosphonium guests , as a way to probe changes in host cavity size or flexibility .
 Chemical: methanol; Chemical: DMF; Chemical: benzyl phosphonium
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: methanol; Chemical: DMF; Chemical: benzyl phosphonium