24221
Thermoplastic glue may have been invented around 1940 by Procter & Gamble as a solution to the problem that water-based adhesives , commonly used in packaging at that time , failed in humid climates , causing packages to open .
 Procter & Gamble
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Procter & Gamble