and { only { filter_eq { all_rows ; top 10s ; 0 } } ; eq { hop { filter_eq { all_rows ; top 10s ; 0 } ; year } ; 2007 } } = true
select the rows whose top 10s record is equal to 0 . there is only one such row in the table . the year record of this unqiue row is 2007 .