907
Methylphenidate - induced obsessive - compulsive symptoms in an elderly man .
 Chemical: Methylphenidate; Disease: obsessive - compulsive symptoms
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: Methylphenidate; Disease: obsessive - compulsive symptoms