3117
The cyanobacterial beta - N - methylamino - L - alanine ( L - BMAA ) is described as a low - potency excitotoxin , possibly a factor in the increased incidence of amyotrophic lateral sclerosis ( ALS ) and Parkinsonism - dementia complex ( PDC ) in Guam .
 Chemical: beta - N - methylamino - L - alanine; Chemical: L - BMAA
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: beta - N - methylamino - L - alanine, L - BMAA 
Answer:
 Chemical: beta - N - methylamino - L - alanine; Chemical: L - BMAA