7184
1 . Exposure to secondhand smoke ( SHS ) can occur in many places ; however , regulations banning smoking may reduce the sources of exposure to SHS to personal areas such as the family car , a source of brief but potently intense exposure .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None