28827
Sphingosine - 1 - phosphate ( S1P ) is a well - known signaling sphingolipid and bioactive lipid mediator .
 Chemical: Sphingosine - 1 - phosphate; Chemical: S1P; Chemical: sphingolipid
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: Sphingosine - 1 - phosphate, S1P, sphingolipid 
Answer:
 Chemical: Sphingosine - 1 - phosphate; Chemical: S1P; Chemical: sphingolipid