Task: Code to Text
Input (English): and { only { filter_eq { all_rows ; town ships ; 18 } } ; eq { hop { filter_eq { all_rows ; town ships ; 18 } ; state / region } ; kachin state } } = true
Output (English): select the rows whose town ships record is equal to 18 . there is only one such row in the table . the state  region record of this unqiue row is kachin state .