and { only { filter_greater { all_rows ; sfc in lb / ( lbf h ) ; 10 } } ; eq { hop { filter_greater { all_rows ; sfc in lb / ( lbf h ) ; 10 } ; engine type } ; nk - 33 rocket engine } } = true
select the rows whose sfc in lb   lbf h  record is greater than 10 . there is only one such row in the table . the engine type record of this unqiue row is nk  33 rocket engine .