greater { hop { filter_eq { all_rows ; agent ; arsine } ; effectiveness as blood agent } ; hop { filter_eq { all_rows ; agent ; vinyl arsine } ; effectiveness as blood agent } } = true
select the rows whose agent record fuzzily matches to arsine . take the effectiveness as blood agent record of this row . select the rows whose agent record fuzzily matches to vinyl arsine . take the effectiveness as blood agent record of this row . the first record is greater than the second record .