38991
Large quantities of aldehydes are produced by the hydroformylation reaction of alkenes , carbon monoxide , and H. Hydroformylation is coupled to the Shell higher olefin process to give precursors to detergents .
 Shell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Shell