and { only { filter_eq { all_rows ; ceased to be queen ; divorced } } ; eq { hop { filter_eq { all_rows ; ceased to be queen ; divorced } ; father } ; leopold vi , duke of austria } } = true
select the rows whose ceased to be queen record fuzzily matches to divorced . there is only one such row in the table . the father record of this unqiue row is leopold vi , duke of austria .