3357
Here , we examined the effect of FTY720 , its active metabolite , FTY720 - P , and sphingosine - 1 - phosphate ( S1P ) on neuronal viability using a classical in vitro model of excitotoxic neuronal death .
 Chemical: FTY720; Chemical: FTY720 - P; Chemical: sphingosine - 1 - phosphate; Chemical: S1P
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: FTY720, FTY720 - P, sphingosine - 1 - phosphate, S1P 
Answer:
 Chemical: FTY720; Chemical: FTY720 - P; Chemical: sphingosine - 1 - phosphate; Chemical: S1P