and { only { filter_greater { all_rows ; speed ; 18.00 km/h } } ; eq { hop { filter_greater { all_rows ; speed ; 18.00 km/h } ; rider } ; roberto heras ( esp ) } } = true
select the rows whose speed record is greater than 18.00 kmh . there is only one such row in the table . the rider record of this unqiue row is roberto heras  esp  .