15274
Petroacetylene ( 1 ) inhibited blastulation of starfish embryos at a concentration of 3 . 1 mu g mL ( - 1 ) or greater .
 Chemical: Petroacetylene
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: Petroacetylene 
Answer:
 Chemical: Petroacetylene