18745
In this work , we have used neutron reflection and surface pressure measurements to study the reaction of the ubiquitous pollutant gas - phase ozone , O3 , with pure and mixed phospholipid monolayers at the air - water interface .
 Chemical: ozone; Chemical: O3
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ozone; Chemical: O3