greater { hop { filter_eq { all_rows ; warship ; chacabuco } ; speed ( knots ) } ; hop { filter_eq { all_rows ; warship ; abtao } ; speed ( knots ) } } = true
select the rows whose warship record fuzzily matches to chacabuco . take the speed  knots  record of this row . select the rows whose warship record fuzzily matches to abtao . take the speed  knots  record of this row . the first record is greater than the second record .