12249
The P - N bond in tabun was also acid labile , whereas the P - O bond was stable .
 Chemical: P - N; Chemical: tabun; Chemical: P - O
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: P - N; Chemical: tabun; Chemical: P - O