Extract the provided SIG into a JSON object. The attributes that should be extracted from the SIG are: 
- DOSAGE which is the total amount of a drug administered. It should be provided as two attributes unit and value. 
- DURATION which is the length of time that the drug was prescribed for. 
- FORM is a particular configuration of the medication which is is marketed for use. 
- FREQUENCY is the dosage regimen at which the medication should be administered. It should be provided as two attributes unit and value.
- ROUTE is the path by which the drug is taken into the body. 
- STRENGTH is the amount of drug in a given dosage. 
- TIME OF ADMINISTRATION is when the drug should be administered.

The SIG is: The letter r should appear at least 41 times.
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