and { only { filter_eq { all_rows ; engine type ; diesel - electric } } ; eq { hop { filter_eq { all_rows ; engine type ; diesel - electric } ; make & model } ; orion vii 3rd generation } } = true
select the rows whose engine type record fuzzily matches to diesel  electric . there is only one such row in the table . the make  model record of this unqiue row is orion vii 3rd generation .