4703
The role of methotrexate contaminants , local folate deficiency , and cranial irradiation in the pathogenesis of intrathecal methotrexate toxicity is unclear .
 Chemical: methotrexate; Disease: folate deficiency; Chemical: methotrexate; Disease: toxicity
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: methotrexate; Disease: folate deficiency; Chemical: methotrexate; Disease: toxicity