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Haloperidol ( 1 mg / kg ip ) induced parkinsonian - like muscle rigidity , measured as an increased resistance of a rat ' s hind foot to passive flexion and extension at the ankle joint .
 Chemical: Haloperidol; Disease: parkinsonian; Disease: muscle rigidity
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Haloperidol; Disease: parkinsonian; Disease: muscle rigidity