10230
Snails exposed to 1 . 0 and 2 . 7 mu g L ( - 1 ) Pb showed full and partial recovery from growth inhibition between 28 and 56 d .
 Pb
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Pb