Task: Code to Text
Input (English): and { only { filter_eq { all_rows ; mean ; 3.0 } } ; eq { hop { filter_eq { all_rows ; mean ; 3.0 } ; drug } ; heroin } } = true
Output (English): select the rows whose mean record is equal to 3.0 . there is only one such row in the table . the drug record of this unqiue row is heroin .