18941
The lowest exposure rates per 100 , 000 population of 5 years or younger were reported in the Public Health Regions in northern and eastern Texas ( 0 . 00 - 2 . 30 ) and the highest rates in the Public Health Regions in southern and western Texas ( 19 . 08 - 39 . 50 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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