Get the data from wolfram

result =  WolframAlpha["The force constant of the carbon monoxide molecule"]

I obtained the data of the force constant through this code, and found that this data belongs to "Result",So I changed the code,get this:

WolframAlpha["The force constant of the carbon monoxide molecule", \"Result"]

I don't know what to do with it. I want to get this number "19.02". What do I do?