less { hop { filter_eq { all_rows ; president ; joão havelange } ; took office } ; hop { filter_eq { all_rows ; president ; sepp blatter } ; took office } } = true
select the rows whose president record fuzzily matches to joão havelange . take the took office record of this row . select the rows whose president record fuzzily matches to sepp blatter . take the took office record of this row . the first record is less than the second record .