818
LgA rats self - administered greater amounts of METH during the second half of training , but when pretreated with vehicle , ShA and LgA rats showed cue - and drug - primed reinstatement at equivalent response rates .
 Chemical: METH
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: METH