9497
In a motorized vehicle a number of easily measurable signals with frequency components related to the rotational speed of the engine can be found , e.g. , vibrations , electrical system voltage level , and ambient sound .
 frequency components, measurable signals; frequency components, rotational speed of the engine; vibrations, measurable signals; vibrations, electrical system voltage level; electrical system voltage level, measurable signals; electrical system voltage level, ambient sound; ambient sound, measurable signals
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 frequency components, measurable signals; frequency components, rotational speed of the engine; vibrations, measurable signals; vibrations, electrical system voltage level; electrical system voltage level, measurable signals; electrical system voltage level, ambient sound; ambient sound, measurable signals