eq { diff { hop { filter_eq { all_rows ; title ; episode 4 } ; original air date } ; hop { filter_eq { all_rows ; title ; episode 5 } ; original air date } } ; -7 } = true
select the rows whose title record fuzzily matches to episode 4 . take the original air date record of this row . select the rows whose title record fuzzily matches to episode 5 . take the original air date record of this row . the second record is 7 larger than the first record .