12014
The results suggest that different apoptosis pathways are triggered by Cu at different time points of the exposure period , as the increase in transcripts was sequential , instead of simultaneous .
 Chemical: Cu
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: Cu 
Answer:
 Chemical: Cu