12433
Exposure of human bronchial epithelial cells to an organic extract of diesel exhaust particle was followed by TRPV4 mediating Ca ( + + ) influx , increased RAS expression , mitogen - activated protein kinase signaling , and matrix metalloproteinase - 1 activation .
 Chemical: Ca ( + + )
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: Ca ( + + ) 
Answer:
 Chemical: Ca ( + + )