and { only { filter_eq { all_rows ; ignition timing ; 180 - 540 } } ; eq { hop { filter_eq { all_rows ; ignition timing ; 180 - 540 } ; engine } ; i4 ' long bang ' } } = true
select the rows whose ignition timing record fuzzily matches to 180  540 . there is only one such row in the table . the engine record of this unqiue row is i4  long bang  .